Unusually large backup file

After restoring to file of approx 6 Mb, idoceo backsup a file of 30 Mb. Restoring a backup from another iPad does not have this issue. Any pointers appreciated.

From iDoceo's main screen tap on Three dots button (top bar center) > Resources.
You will probably see in this list a large file (video or PDF)

Thanks for the tip, but there isn't a large file. Immediately backing up a restored file gives the same problem. The restored file is approx 6Mb. Idoceo backs this up as 30Mb. Perhaps a simple delete and re install will do the trick.