Given the limitations of the PS5's internal storage, an external USB drive makes a lot of sense. Here's what you can and cannot do from an external drive.
Possible file corruption on external hard drive? : r/playstation
Seagate Game Drive for PS5 2TB External USB 3.0 Portable Hard Drive Officially Licensed (STLV2000302)
Seagate Game Drive for PS5 2TB External USB 3.0 Portable Hard Drive Officially Licensed (STLV2000302)
Seagate Game Drive for PlayStation - External Storage for PS5, Seagate US
So can you use an external for ps5 games or only ps4 games? : r/playstation
You can now backup PS5 games to an external USB storage drive
Avolusion PRO-5X Series 2TB USB 3.0 External Gaming Hard Drive for PS5 Game Console (White) - 2 Year Warranty
Avolusion PRO-5X 8TB USB 3.0 External Gaming Hard Drive for PS5 Game Console 810064870576
Sony will finally unlock the PS5's SSD slot for everyone tomorrow
PS5: How to watch videos and listen to music from a USB drive
Why can't we run PS5 titles from USB storage although we can store games on an external hard drive? - Quora
Avolusion HD250U3-WH 1TB USB 3.0 Portable External Gaming Hard Drive - White (for PS5, Pre-Formatted) - 2 Year Warranty : Electronics
How to Stream PlayStation 5 Games to All Your Devices With Remote Play