Ask PlayStation on Twitter: "@Hasanuz07611840 Thank you for contacting us. In this case we recommend you to do a backup and format the external Hard drive. It looks like it got corrupted
PS4 Third-Party Hard Drive Solutions - PlayStation 4 Guide - IGN
Fix PS4 External Hard Drive Not Working/Recognized [Full Guide in 2023]
UPGRADING THE HDD ON THE PS4 - HOW TO FIX ERROR CODE CE-34788-0 - YouTube
How to upgrade your PS4 hard drive (without losing P.T.) | GamesRadar+
Fixed] PS4 External Hard Drive Not Working/Recognized Issue
Solved]PS4 External Hard Drive Not Not Working/Recoginized
Fixed PS4 Error Code CE-34335-8 | Cannot start the PS4 | Cannot access system storage - YouTube