if you want to change over to the ps4 ext storage from apptousb just use the move function if you have 2 hdd's
plugin both the apptousb hdd and the ps4 formatted ext hdd and run hen 1.7 for the shellcore(ext hdd) patch.
- Select
[Settings] > [Storage].
- Select the [System Storage], and then select [Applications].
- Press the OPTIONS button and select [Move to Extended Storage].
- Add ticks to the applications you wish to move and select [Move].
the ps4 will copy the symlinked games created by apptousb to the external storage and they will run off the ext hdd not the apptousb hdd.
in my tests the pkg files remained on the apptousb hdd after the move process(the console did not delete them).
if you only have 1 hdd and you need to format the apptousb hdd as ext then you will need to copy the games to your pc or somewhere and format the hdd to ext and then reinstall the games.
keep in mind that when you switch over to the ps4 external format you will no longer be able to plug the hdd in to the pc and access the pkg files.
you will have to plug it into the ps4 and use ftp to get the pkg files to pc from
/mnt/ext0/
its best to have a backup hdd with all the pkg files for reinstalls and stuff.
don't forget to backup the
app.db because the console will still wipe out the fpkg listings using the ps4 external format if the database rebuilds, which means you will have to reinstall them if you have no backup.