Yunohost needs to offer disk encryption to the masses.
I see no docs or FAQ about disk encryption. If your Raspberry holds all your valuable data and somebody steals it, he’ll have it all!
OTOH, if you are not careful, you could lose it yourself.
Yunohost should offer disk encryption. Encrypting data should be enough. Behind the scenes it could use a partition, or could create a block device and mount it (if partitioning is too much).
When encrypting, the UI would ask you for a password or let you plug in an USB to be used as decryption key. Also it would ask you size, and tell you the pros and cons in an Understandable way.
When blocked, the UI would display a message asking your encryption password or telling you to plug in your security USB drive.
Another UI should let you modify the password or USB drive.
No encryption. Not a good one, though. Current situation.