I have a Hitachi HDS721616PLA memory stick. When trying to add more photos to it, I get an error message ox80070052. Searching for that gets me to regicure which couldn't fix the problem either. Any ideas?

Ron

Reformat the stick - this will delete all content.
Then Make a new Folder and copy ALL photos into this folder

Here are some tips
Solution For Error 0×80070052 on USB Thumbdrive, Flash Drive And SD Card | GeckoandFly Make Money Online