Sorry, doesn’t make sense to me:
- encrypted backup
Backups should not be encypted by themselves (nor compressed). This makes it harder to restore, or rather more likely that recovery may fail, because both encryption as well as compression means the whole backup set becomes unusable of parts of it get corrupted.
Uncompressed and unencrypted backup sets do not have this issue.
In addition, backups are currently (at your option), encrypted at rest: You can choose to encrypt the SD card, and NextCloud also has this feature.
- option to save accounts with their passwords
Nope. Passwords belong into password managers, not in backup sets.
- jolla mail backup
Huh? Unless you are using POP3 and permanently store all your mail on the device, what would be the purpose of this?
Both with IMAP and Exchange/MSO365, all mail is stored off-device.
- allow auto backup on SDCard
Absolutely, and there is a FR for this: Automatic backup to SD - #6 by thejiral