I'm sure this is not a common problem as most people aren't even aware the fenix can do screenshots or use that feature
but it is annoying so maybe an app dev or garmin dev knows how to fix this or it can be addressed in a firmware update eventually
when I first starting using the screenshot feature it was snappy
now it takes a few seconds to respond and several seconds to finish
my educated guess would be this is from the FAT directory tables on the garmin storage space becoming "dirty" even after old screenshots deleted
but optimizing it as a drive which should clean things up doesn't change a thing
other than a total reset/reformat/reflash any ideas?