Should work. :) But you will certainly notice a difference in speed compared to the SSD. Alternatively, you could also retrofit a Game Drive M.2, certainly the nicer solution.
Seagate Game Drive M.2 SSD for PS5 (2000 GB, M.2 2280)
I think this hard drive is only compatible with the Ps4. It is best to buy external hard drives from the same brand as the device. (but don't know if Apple offers these).
Digitec is not responsible for the internal operation or malfunction of the PS4.
Try putting the default save on the external drive.
Go back into the game and make a new backup.
Otherwise see the official PS4 documentation
https://manuals.playstation.net/document/fr/ps4/basic/extendedstorage.html#:~:text=You%20can%20d%C3%A9place%20applications,Param%C3%A8tres)%20%3E%20%5BStorage%5D.&text=S%C3%A9select%20storage%20o%C3%B9%20se,%2C%20then%20s%C3%A9select%20%5BApplications%5D.
HDD
These data relevant to you are not given because even the manufacturer does not specify them. What should Digitec write then?
https://www.seagate.com/de/de/consumer/play/game-drive-playstation/#specs
https://www.seagate.com/www-content/datasheets/pdfs/game-drive-playstation-emea-DS1995-7-2010-DE-de_DE.pdf
There are reasons why they are not given and Seagate is not the only manufacturer. Hardly anyone actually does this with external hard drives. If the manufacturer does not give exact technical specifications, he is very flexible in the HD he installs in the housing. So he can always take what is currently available and cheap.
Seagate are advertising it now as compatible with both PS4 & PS5 but there are some stories around that some external PS4 drives are not functioning 100% on the PS5.. As soon as I can actually get hold of a PS5 I will update..
According to the manufacturer and the seller, the Game Drive should be compatible with the PS5.
p.s.: I use the Game Drive myself and am curious to see how well it works with the PS5.
Yes, you can format it as a hard disk. But you cannot use it as an external drive for games (i.e. for gaming) and save data at the same time. Either or. Unfortunately
The disk is formatted by the PS4 for the system so that it is available for games, etc. The data is not flipped.
Therefore, "FlipFlopen" is not possible without always losing all data.