I use a galaxy S9 bought from /e/shop , everything is OK ( /e/ is a f… good OS ! )
yesterday i booted in recovery mode , launched a full backup (all partitions selected) on a 16 Go SD card ( 15 Go available )
backup begun , and stop with " backup failed " and no more information on failure causes
any ideas ?
According to the shop page, the S9 has 64 GB internal storage. Are you sure that everything you wanted to backup would fit on a 16 GB SD card?
And the obligatory hint: TWRP doesn’t do a full backup. You might want to take care of your user data by other means (copying it via USB while TWRP is running, for instance) … What is EXCLUDED from a TWRP backup?
If you know your way around the Linux terminal, TWRP - Advanced - Terminal.
Else you can do a basic check with TWRP - Wipe - Advanced Wipe - (select Micro SD Card) - Repair or Change File System - (file system will be given near the top of the screen).
TWRP might not distinguish between different FAT formats in case it displays “fat” there, but you can also format the card there by choosing “Change File System” to make sure TWRP can handle the card.