It was designed to allow other media player companies to compete with Apple’s iPod and iTunes.
#Android file transfer can t access device storage android
MTP stands for “Media Transfer Protocol.” When Android uses this protocol, it appears to the computer as a “media device.” The media transfer protocol was widely promoted as a standardized protocol for transferring audio files to digital music players using Windows Media Player and similar applications. The craziness had to stop, so modern Android devices use different USB connection protocols. Android can now use the modern ext4 file system for all its partitions because they don’t need to be directly readable by Windows.Ĭonnecting an Android phone or tablet to a computer as a standard USB storage device is convenient, but there are too many downsides. Not only does Microsoft have patents it exerts on FAT, FAT is also an older, slower file system without a modern permission system. RELATED: Why Do Removable Drives Still Use FAT32 Instead of NTFS?īecause the file system had to be accessible from Windows device, it had to be formatted with the FAT file system.
You couldn’t resize these partitions without rooting your device - the manufacturer chose the appropriate amount for each partition at the factory. Android installed apps and its system files onto /data, while user data was stored on the /sdcard partition.īecause of this hard split, you might end up with too little space for apps and too much space for data, or too much space for apps and too little space for data. System files had to be stored somewhere they’d never be disconnected from the device, so you ended up with Android devices containing separate /data partitions for “system storage” and /sdcard partitions for “USB storage” on the same internal storage device. Any files or apps stored on the SD card or USB storage would be unavailable when it was connected to the computer. When you connected the storage to the computer, it was disconnected from the Android operating system running on the device. Whatever device is accessing the storage needs exclusive access to it. There were problems with the way this worked. The drive makes itself completely available to the computer, just as if it were an internal drive. USB mass storage is the standard protocol used by flash drives, external hard drives, SD cards, and other USB storage devices. When disconnecting it from the computer, you’d have to tap a “Turn off USB storage” button. When you connected your Android device to your computer, you’d have to specifically tap a “Connect storage to PC” button to make the Android device’s storage accessible to the computer over USB mass storage.
USB mass storage - also known as “USB mass storage device class,” USB MSC, or UMS - was the way older versions of Android exposed their storage to a computer.
Why Modern Android Devices Don’t Support USB Mass Storage
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