Working great on WP 5.6.1

Quick thank you for this, it worked fine on WP 5.6.1.

I was able to browse non-WP folders containing old website images which a Gallery Plugin wouldn’t let me do as it restricted you to the WP folder, didn’t need to keep them all but this made it quick to bulk select then untick the ones I didn’t need, like manually created old thumbnails. Then ran the Regenerate Thumbnails plugin to be sure I had the correct size thumbnails automatically if and when needed and the XO Featured Images tool plugin to make sure my Featured Images were okay.