Large backup

During the encryption process, oneSafe will use a part of your device's empty space to encrypt the data (even if later you will store it in iCloud or iTunes).
For example, if your oneSafe's content is 1GB large, you need to have 1GB empty space on your device to encrypt the backup: so please make sure your device's empty space is large enough?

Even if the empty space is large enough, A problem may come if you are storing one (or more) very large item (video ? other documents?...).

In a recent version of oneSafe, it's possible to exclude categories from a backup.
I advise you to try to backup your data in 2 times (or more if needed): excluding half of your categories in the first one, and the others in the second one.