How to back up files on your tablet to an external SD card ?
As for the SD card back up problem, please make sure the SD card has been set up according to the following step and make sure the SD card has enough storage space as the picture shows, the file you are trying to copy is a bit big:
1. go to Settings–System settings—Storage
2. then tap the SD card, and tap SET UP option;
3.Click Portable storage button
4. Click Format SD card;
5.go to ES File Explorer—-Local—-Home—Scan–Vehicle to find the vehicle file that needs backup
6.Long press the file, tap Copy button on the bottom menu.
7.Go to ES File Explorer—-Local and tap the SD card name to find the directory that you would like to save the file, then tap Paste.
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