Dear Jeff McL,
Thank you for posting your query in our community.
Your question is "Move files to a folder in SharePoint". To make sure you have enough permission and own the site, we suggest you check following below methods.
- Click settings icon on the site >> site permissions >> advanced permission settings >> site collection admin >> make sure your account is added here.
- You may try go to site contents >> New >> Document library to create a new library. Then create some test folders and files on the library and check if you can move on the new library.
- Clear browser cache: Sometimes, browser cache can interfere with SharePoint functionality. You may try clearing your browser cache and cookies by pressing shift + ctrl + delete, then restart your browser and check if the options are available.
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Have a nice day!
Best regards,
Sophia