I've been having problems with my Aura not recording when in standby and not waking up with a working Freeview Live app. I decided to go for the factory reset ("this will not delete your recordings" version). I should have checked various forums first as there is a problem. It's true recordings aren't deleted, they are just difficult to access and impossible to delete. They don't show up in "Recordings" or by trying to access remotely by FTP. Install a third party file manager and you find the files at
/Internal_HDD/Android/data/com.humaxdigital.corona.tvinput.freeview/files/recordings (_ is a space). If the file manager has an FTP server you can transfer the files to a PC and, providing they are not HiDef, you can play them. Strangely, they are in the same folder as new recordings - they just aren't visible from the Humax UI or standard FTP.
From
https://myhumax.org/forum/topic/how-to-recover-lost-recordings
Unfortunately the files are in the wrong format for this. In the folder I mentioned above each recording is a folder - containing the actual recording plus various sidecar files. The standard FTP creates one playable file containing all that data. It can be uploaded. Unless one can recreate this from downloading the folder contents it isn't possible to upload into the recording area. Life's too short and I can't be bothered. The next problem is - there is no way to delete these files.
Looks like a lot of downloading followed by a disk format!
I now consider an Aura factory reset as NOT preserving your recordings in a suitable way. I warn other Aura users of this problem. Be aware!