Are you able to tell me what steps to follow so that I Can EDIT the document without waiting for the “Notify” message?? I use Windows 11 64 bit and I have plenty of hard drive room on my home Windows desk top.
You have restricted file access on that USB drive. Copy the file to your home directory on hard disk and edit that copy.
You may find this page is an informative read, Preventing data disaster - The Document Foundation Wiki
It could help you plan a more robust strategy for working on your documents. Normally, I link this after someone has had data loss; you get the link before loss. The advice is not specific to LibreOffice.