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If I can read the disks, and verify that there is nothing critical, I could "Downgrade" to Fat*, and it might even work for Android.
– Olav
Commented Jun 11, 2017 at 13:25
As we can see there are only 2 partitions with a bit of space, so I think I should either keep partitions and look at those, or find a way to backup and restore several partitions in one go.
– Olav
Commented Jun 11, 2017 at 13:26
Do not try to convert an ext4fs partition to FAT on an Android device! If Android has set up a partition as ext4fs, chances are it needs features present in ext4fs that aren't provided by FAT, such as Unix-style ownership and permissions. There may well be exceptions to this rule, but unless you have a very deep understanding of Android, you're more likely to create problems than solve them by changing the filesystem used on a partition.
– Rod Smith
Commented Jun 11, 2017 at 14:48

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