How to install applications on an android memory card. Connecting an SD card to a microcontroller Embedded SD library examples
Memory cards today are very widely used to expand the built-in memory of mobile devices. But how to connect a memory card to a tablet and how to view it on a computer?
Connecting a memory card to a tablet
It should be said right away that memory cards come in different formats, and microSD cards are usually used in mobile devices. If you have a full-sized SD card, for example, from a camera, you will not be able to connect it to the tablet. And in Apple devices there is no slot for memory cards at all.
On tablets with Android and Windows, the microSD card slot is placed on one of the faces, and on smartphones it can sometimes be hidden under the back cover. Insert the card into the slot with the contacts facing down. The device recognizes it automatically, after which you can save photos and other multimedia files to the memory card, and if the system allows it, then install applications.
Connecting a memory card to a computer
Some computers and laptops may be equipped with a built-in card reader for memory cards of different formats. But if it is not there, you can buy a USB card reader - a memory card is inserted into it, and it itself is connected to one of the computer's USB ports. After that, the contents of the memory card can be viewed in Explorer in the same way as if it were a simple flash drive.
Installation of programs on the internal memory of the tablet is carried out by default. To place the application on the built-in memory card, it is enough to perform a standard installation. It will take a little longer to send it to external media. One simple session of settings will clean up the file system of the device, installing each new application on the SD card.
Option 1: specifying the installation address
Some programs during installation ask the user where to stay. Specifying the installation address is not difficult. Choose a removable memory card, and that's it. But this applies only to some applications, such a minority.
Option 2: Set the installation path in advance
The application must support the app2sd patch if the version of the Android OS on the tablet is earlier than 2.2. There will be no such items in the settings. For all new versions, this algorithm for solving the problem is suitable.
Go to "Settings", find the item "Memory". Click on it and the memory settings menu will open. Here you can also find out about the amount of free memory on your device, how much space is on the tablet in general, how much internal memory is occupied. Some people insert an SD card into a card reader and find out the data about the flash drive on a computer, not knowing that this can be done on a tablet.
Find the "Default Burn Disk" section, which offers you several sources for installing applications. Among them, select "SD-card". Click on this item, and you will see a circle opposite it. Now installing applications on the memory card on the tablet is the default.
Option 3: Using Third Party Programs
Most likely this method will help you. But he demands. You can find out whether or not you have root rights on the tablet by. We download special applications, such as FolderMount or GL to SD, which will help transfer game and program data to an SD memory card. See video instructions below:
Option 3
Install a program on your tablet PC that will allow you to select the installation address. Before installing the application directly, a dialog box will appear in which you will specify the installation address.
This is the most convenient option offered. Because the forced installation of "default" is not desirable in all cases. Utilities such as InstallManager, MagicUneracer will help organize economical and rational filling of the tablet's memory. By the way, these same programs also remove programs with all auxiliary files.
If the application is not installed on the SD card
Open the "Applications" item in "Settings". In the list of applications, select the one you would like to transfer to a removable card. Click on the application icon and a menu will open. See if it has a "Move" option. If there is, press the option button and select the memory card. This procedure does not require the installation of additional software, you can do it yourself.
For most people, microSD is just a form factor, but it really isn't. You can easily insert any microSD card into a standard slot, but not every one of them will work, since cards differ in many ways.
Format
There are three different SD formats in total, available in two form factors (SD and microSD):
- SD (microSD) - drives up to 2 GB, work with any equipment;
- SDHC (micro SDHC) - drives from 2 to 32 GB, work on devices with support for SDHC and SDXC;
- SDXC (microSDXC) - drives from 32 GB to 2 TB (currently maximum 512 GB), only work on SDXC-enabled devices.
As you can see, they are not backwards compatible. Memory cards of the new format will not work on old equipment.
Volume
Support for microSDXC declared by the manufacturer does not mean support for cards of this format with any volume and depends on the specific device. For example, HTC One M9 works with microSDXC, but officially only supports cards up to and including 128 GB.
Another important point is connected with the volume of drives. All microSDXC cards use the exFAT file system by default. Windows has been supporting it for more than 10 years, it has appeared in OS X since version 10.6.5 (Snow Leopard), exFAT support has been implemented in Linux distributions, but out of the box it does not work everywhere.
High speed UHS interface
I or II is added to the logo of a card with UHS support, depending on the version SDHC and SDXC cards can support the Ultra High Speed interface, which provides higher speeds (UHS-I up to 104 MB/s and UHS-II up to 312 MB/s) if the device has hardware support. UHS is backward compatible with earlier interfaces and can work with devices that do not support it, but at standard speed (up to 25 MB/s).
2. Speed
Luca Lorenzelli/shutterstock.com Classifying the write and read speed of microSD cards is as complex as their formats and compatibility. The specs allow four ways to describe card speed, and since manufacturers use them all, there's a lot of confusion.
speed class
The speed class marking for ordinary cards is a number inscribed in the Latin letter C The Speed Class is the minimum write speed to the memory card in megabytes per second. There are four in total:
- Class 2- from 2 MB/s;
- Class 4- from 4 MB/s;
- Class 6- from 6 MB/s;
- Class 10- from 10 MB/s.
By analogy with the marking of conventional cards, the speed class of UHS cards fits into the Latin letter U Cards operating on the high-speed UHS bus have only two speed classes so far:
- Class 1 (U1)- from 10 MB/s;
- Class 3 (U3)- from 30 MB/s.
Since the minimum value of the entry is used in the designation of the speed class, theoretically a card of the second class may well be faster than a card of the fourth. Although, if this is the case, the manufacturer will most likely prefer to state this fact more explicitly.
Max speed
The speed class is enough to compare cards when choosing, but some manufacturers also use the maximum speed in MB / s in the description, and more often not even the write speed (which is always lower), but the read speed.
Usually these are the results of synthetic tests under ideal conditions, which are unattainable with normal use. In practice, the speed depends on many factors, so you should not focus on this characteristic.
Speed multiplier
Another classification option is a speed multiplier, similar to the one used to indicate the read and write speed of optical discs. There are more than ten of them, from 6x to 633x.
The 1x multiplier is 150 KB/s, which means that the simplest 6x cards have a speed of 900 KB/s. The fastest cards can have a multiplier of 633x, which is 95 MB/s.
3. Tasks
StepanPopov/shutterstock.com Choose the right card for specific tasks. The biggest and fastest is not always the best. For certain use cases, volume and speed may be excessive.
When buying a card for a smartphone, volume plays a bigger role than speed. The advantages of a large storage are obvious, but the advantages of a high transfer rate on a smartphone are almost not felt, since large files are rarely written and read there (unless you have a smartphone with 4K video support).
Cameras shooting HD and 4K video are a completely different matter: both speed and volume are equally important here. For 4K video, camera manufacturers recommend using UHS U3 cards, for HD - regular Class 10 or at least Class 6.
For photos, many professionals prefer to use several smaller cards to minimize the risk of losing all the pictures in force majeure. As for the speed, it all depends on the photo format. If you shoot in RAW, it makes sense to invest in microSDHC or microSDXC class UHS U1 and U3 - in this case, they will reveal themselves to the fullest.
4. Fakes
jcjgphotography/shutterstock.com No matter how trite it may sound, but buying a fake under the guise of original cards is now easier than ever. A few years ago, SanDisk claimed that a third of the SanDisk memory cards on the market were counterfeit. It is unlikely that the situation has changed much since that time.
To avoid disappointment when buying, it is enough to be guided by common sense. Refrain from buying from untrustworthy sellers and beware of "original" cards that are priced well below the official price.
Attackers have learned how to counterfeit packaging so well that it can sometimes be very difficult to distinguish it from the original. With full confidence, it is possible to judge the authenticity of a particular card only after verification with the help of special utilities:
- h2testw- for Windows;
If you have already experienced the loss of important data due to a broken memory card for one reason or another, then when it comes to choosing, you will most likely prefer a more expensive card from a well-known brand than an affordable "no-name".
In addition to greater reliability and safety of your data, with a branded card you will receive high speed and a guarantee (in some cases even a lifetime).
Now you know everything you need to know about SD cards. As you can see, there are many questions that you will have to answer before purchasing a card. Perhaps the best idea would be to have different maps for different needs. So you can use all the advantages of the equipment and not expose your budget to unnecessary costs.
Many people want to know how to install applications on an sd card in Android devices. If the user has a phone or tablet with a small amount of permanent memory and RAM, then he probably often uninstalls programs to free up space. But there is a way to increase the amount of memory by using an SD card.
Ways to install programs
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By default, Android games and apps are installed on your smartphone's built-in storage, which may be too small. If there is an SD, then you can make sure that some programs are installed there by default, thereby freeing up space for more information. Under certain conditions, almost any installed program can be transferred to a removable USB flash drive.
How to install an app on an android sd card? There are several different ways to carry out this operation. Choosing the correct method depends on the version of the operating system and the data that needs to be moved. In the settings of Android 6.0 Marshmallow, you can adapt SD as built-in storage, automatically installing allowed games and software on removable storage.
Some smartphones without a new operating system allow you to move the application to the memory card manually, but only if the developer allows it. An alternative way to transfer programs is to use the Link2SD application.
It should be noted that programs launched from the card are likely to run slower than those that are in the built-in memory.
That is why you can only transfer applications to an external flash drive in case of emergency. It is recommended to use this method whenever possible for programs that do not need high speed for normal operation.
How to adapt an SD card to internal memory
Traditionally, SD on Android has served as portable storage. This means that you can store videos, music and photos on them for use on your smartphone. SD can be connected to a computer for two-way file transfer. When used as a portable storage device, the card can be removed without affecting functionality.
Read also: How to sync an Android phone or tablet with a computer
How to install applications on a memory card? Android 6.0 Marshmallow allows you to use SD as built-in storage, turning it into an integral part of your smartphone. If you accept a removable flash drive as the main storage, then by default new software will be installed on it. If desired, the user can move the program back to the built-in memory.
If an external drive is used as the main storage, then it cannot be removed without affecting the functionality of the gadget. At the same time, the card cannot be used on other devices (including a PC). The SD card is formatted as a local EXT4 drive, encoded with 128-bit AES encryption and mounted as part of the system. Once Marshmallow accepts the drive, it will only work with it.
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Now about how to set up the SD card. Be sure to back up your data and save it on your computer before using the flash drive as internal storage. The onboarding process will delete all data. You can return data to SD after the drive is accepted as built-in storage.
To transfer data, you need to connect Android directly to the computer. It is not possible to remove the SD from the device and connect it directly to a PC to transfer files. If the drive was used as portable storage and it contains data, then you need to transfer them to the built-in memory. If you do not do this, the programs will be deleted and they will have to be installed again.
When using SD as internal storage, you need to make sure that the card is fast. When buying a new drive, look for Class 10 and UHC. If you choose a cheaper and slower SD, then it will slow down the device as a whole. If there are plans to set up the drive as internal storage, then it is better to spend money on getting a fast card. The Android system will test the SD speed during the sync process and warn the user if it is too slow and could negatively affect the performance of the gadget.
Hello.
Today, one of the most popular media types is the flash drive. And no matter what anyone says, the CD/DVD age is coming to an end. Moreover, the price of one flash drive is only 3-4 times more than the price of a DVD disc! True, there is one small “but” - it is much more difficult to “break” a disk than a USB flash drive ...
Although not often, one unpleasant situation sometimes happens with flash drives: you take out a microSD flash card from your phone or camera, insert it into a computer or laptop, but he does not see it. There can be quite a few reasons for this: viruses, software errors, failure of a flash drive, etc. In this article, I would like to stop on the most popular causes of invisibility, as well as give some tips and advice on what to do in such cases.
Types of flash cards. Is SD card supported by your card reader?
Here I would like to stop in more detail. Many users often confuse one type of memory card with another. The fact is that there are three types of SD flash cards: microSD, miniSD, SD.
Why did manufacturers do this?
It's just that there are different devices: for example, a small audio player (or a small mobile phone) and, for example, a camera or photo camera. Those. devices are completely different in size with different requirements for the speed of flash cards and the amount of information. For this, there are several types of flash drives. Now in more detail about each of them.
1.microSD
Size: 11mm x 15mm.
MicroSD flash cards are very popular thanks to portable devices: players, phones, tablets. Using microSD, the memory of the listed devices can be increased by an order of magnitude very quickly!
Usually, when buying, they come with a small adapter so that this flash drive can be connected instead of an SD card (more on them below). By the way, for example, to connect this flash drive to a laptop, you need to: insert the micsroSD into the adapter, and then insert the adapter into the SD slot on the front / side panels of the laptop.
2. miniSD
Size: 21.5mm x 20mm.
Once popular cards used in portable technology. Today, they are used less and less, mainly due to the popularity of the microSD format.
3.SD
Size: 32mm x 24mm.
Flash cards: sdhc and sdxc.
These cards are mainly used in devices that need a large amount of memory + high speed. For example, a video camera, a DVR in a car, a camera, etc. devices. SD cards are divided into several generations:
- SD 1 - from 8 MB to 2 GB in size;
- SD 1.1 - up to 4 GB;
- SDHC - up to 32 GB;
- SDXC - up to 2 TB.
About very important points when working with SD cards!
1) In addition to the amount of memory, SD cards indicate the speed (more precisely, the class). For example, in the screenshots above, the card class is "10" - this means that the exchange rate with such a card is at least 10 MB / s (more details about classes: https://ru.wikipedia.org/wiki/Secure_Digital). It is important to pay attention to what flash card speed class is required for your device!
2) microSD using special. adapters (they usually write adapter (see screenshots above)) can be used instead of regular SD cards. True, doing this always and everywhere is not recommended (just because of the speed of information exchange).
3) SD card readers are backwards compatible: i.e. if you take a device that reads SDHC, it will read SD cards 1 and 1.1 generations, but will not be able to read SDXC. That is why it is important to pay attention to which cards your device can read.
By the way, many "relatively old" laptops have built-in card readers that are not able to read new types of SDHC flash cards. The solution in this case is quite simple: buy a card reader connected to a regular USB port, by the way, it looks more like a regular USB flash drive. Issue price: several hundred rubles.
SDXC card reader. Connects to a USB 3.0 port.
The same drive letter is the reason for the invisibility of flash drives, hard drives, memory cards!
The fact is that if your hard drive has a drive letter F: (for example) and your inserted flash card also has F:, then the flash card will not be displayed in Explorer. Those. you will go to "my computer" - and you will not see a flash drive there!
To fix this, you need to go to the "disk management" panel. How to do it?
In Windows 8: press the combination Win + X, select "disk management".
In Windows 7/8: press the combination Win + R, enter the command "diskmgmt.msc".
Next, you should see a window that will show all connected drives, flash drives, and other devices. Moreover, even those devices that are not formatted and that are not visible in "my computer" will be shown. If your memory card is on this list, then you need to do two things:
1. Change its drive letter to a unique one (to do this, simply right-click on the flash drive and select the operation to change the letter in the context menu, see the screenshot below);
2. Format the flash card (if you have a new one, or there is no necessary data on it. Attention, the formatting operation will destroy all data on the flash card).
Change drive letter. Windows 8.
Lack of drivers is a popular reason why the computer does not see the SD card!
Even if your computer / laptop is brand new and only yesterday you brought them from the store - this absolutely does not guarantee anything. The fact is that the sellers in the store (or their specialists who prepare the goods for sale) could simply forget to install the necessary drivers, or simply be too lazy. Most likely you were given discs (or copied to a hard drive) of all the drivers and you only need to install them.
In general, there are special programs that can scan your computer (more precisely, all its devices) and find the latest drivers for each device. I already wrote about such utilities in previous posts. Here I will give only 2 links:
- Programs for updating drivers: ;
- Finding and updating drivers:
Connecting an SD card via USB using some device
If the computer does not see the SD card itself, then why can't you try to insert the SD card into some device (for example, a phone, camera, camera, etc.) and connect it to the PC already? To be honest, I rarely take out a flash card from devices, preferring to copy photos and videos from them by connecting them to a laptop via a USB cable.
Do I need special programs to connect my phone to a PC?
New operating systems such as Windows 7, 8 are able to work with many devices without installing additional software. Drivers are installed and the device is configured automatically when the device is connected to the USB port for the first time.
For each brand of phone / camera, there are utilities recommended by the manufacturer (see the manufacturer's website) ...
1. Try to connect the card to another computer and check if it recognizes and sees it;
2. Check your computer for viruses (). Rarely, but there are some types of viruses that block access to disks (including flash drives).
That's all for today, good luck everyone!
