I am having the same issue. huge pain not being able to save my work!!!!
to solve it first I had to assign administrator rights to myself and all programs I use.. that took me several hours. its not good enough to be a "administrator" you have to have full permissions to read write also.
after doing that, and rebooting to re-log in as my new admin w permissions,
now I am changing the attributes for each and every folder from read only, you can find this by right clicking on the folder scrolling to properties .. click on that... and then finding it on the general tab , unclick the box that says read only
and then click apply
a dialog box will pop up telling you you must have admin rights to make the change. click apply and it will start changing to remove read only. If you click ok it will not update the attribute and you will have to open the properties box again
I have tried to change the attributes for all files from the drive and it will start but ends up with errors and closes out. so now am going through the painfully slow process of changing the attributes each file
It is a long and very frustrating process,, I have been working on this almost all night and since I woke up this morning, some of my photos I cannot even begin to edit them because I won't be able to save my changes to any where. My Seagate drive
is also effected as well as all the files in onedrive and icloud, UGGG!!!!
I pray the attributes won't change back if I reboot.
I hope someone from Microsoft or with real tech background will respond with a simpler faster solution (and permanent) then what I have been able to come up with.
I know just enough to create more problems but since I realize I am not the only one and how frustrating this situation is... I thought I should share my round about way of fixing this situation