A Factory Reset should not delete any recordings on the HDD.
Under the Freeview Play Preferences> Factory Reset the explanation specifically says recordings will be saved.
Can we just clarify that you are referring to recordings already made on the Aura, or the Recording Schedule
which does get deleted during a Factory Reset.
To preserve your Recording Schedule use the Backup Preferences option before the reset and then use Import
Preferences option after the reset.
If you did indeed lose your recordings, can you explain in further detail what you did prior to the Factory Reset.