The "recycle bin" feature of Samsung "My Files" is amazing for data loss prevention when moving files out of the smartphone.

There used to be two ways to move files out of the smartphone to make space free. One is direct moving, the other is copy-deletion. The first is self-explanatory, the second means first copying the files and then deleting them on the phone.

Thanks to the the recycle bin, which keeps data for a month, files on the phone can be copied out and then put into the recycle bin instead of immediately deleted.

This means that if the copying was incomplete, there is a thirty-day grace period to get the files back from the phone.

The benefit of moving files instead of copy-deleting them is the lack of the deletion step. Moving files out directly does not have the emotional barrier of deleting the files from source like the deletion step of copy-deleting does.

Moving files feels like moving items to a new room, where as the deletion step after copying feels like destroying something.

So why not move files out? Because there is a risk of data loss if the device disconnects while files are moved to an USB OTG device. Due to write buffering, files that are moved out might be deleted on the phone shortly before they are completely written on the USB-OTG.

This is not an issue with MTP (Windows or Linux through USB cable) because the file systems are managed by the computer, so if the phone disconnects while files are moved out of the phone using MTP, the file system is kept intact by Windows or Linux.

Now, thanks to the recycle bin, there is no emotional barrier to deletion because the files on the phone are automatically deleted after 30 days in the absence of the user. The user can press the "delete" button without worries because of knowing "I can get it back until a month from now anyway".