Is it okay to use an external flash drive to store a Photos Library?

macos photos.app flash-memory

Solution 1:

There is Apple support document Move your Photos library to save space on your Mac where among other things are stated:

To prevent data loss, Apple doesn't recommend storing photo libraries on external storage devices like SD cards and USB flash drives, or drives that are shared on a network.

Related

Are macos Mojave Security Updates Cumulative?
System detects digital output when headphones plugged in, audio does not work
Audio doesn't work in OSX but the start-up chime does
How to stop iPhone from listing Apple TVs as audio options during phone calls?
Incoming phone call is going to the phone audio instead of my blueetooth connected headset
Early 2015 13" MacBook Pro Retina Won't Power On
Wifi Tx rate in airport and speedtest cli upload/download speeds are drastically different
How did Apple re-install everything in a clean Big Sur install, without access to backups?
Unable to install mac Big Sur beta 11.0.1 in Macbook pro 2020
When mirroring my Macbook Pro with an ultra-wide external display, can the resolution be set to the external's native resolution?
How can I make a macOS Mojave bootable USB installer in Windows 10?
Photo library won't import back on Mojave after Catalina