Can't count files and folder's size for usb-hdd , at property window if press "refresh" button show different results 2700 files in 23 subfolders, 16 000 files in 67 subfolder etc. Looks like calculating process begin and unexpectedly stops.
Thanks for the bug report! I'll reassign to kfile/kpropertiesdialog.
Works for me in KDE Frameworks 5.47.