Windows 10: Cannot save files "You Don't Have Permission to Save..." W10

I have recently upgraded to Windows 10. I loved the changes, until yesterday.
I am signed in as the administrator of my account. I tried to save a simple spreadsheet to Documents in One Drive. I received this message:
"You don’t have permission to save in this location. Contact administrator. " The message also gave me the option of saving to my Document folder, but even if I checked “yes”, nothing happened.

I did not have this problem previously until I tried to save to One Drive.

I then discovered by trying other applications, such as Word, that I could not save any file to any location, such as documents on this PC. For reference, I am neither a CS major nor a developer. To the contrary, I am a retired mathematics teacher in my 60’s. However, I can follow instructions as outlined if you are able to help. Thank you!

:)

 

Not Authorized to File

After installing Windows 10 I can not create any document or receive any document and save it to disk. When I try the "Save As.." or "Save" file it returns an error "You don't have permission to save files in this network location" and yet I am the Admin.

 

Windows 10 file location

Since upgrading from Windows 7, when trying to save a Microsoft Word file to "this pc>documents>***" I receive the following message, "You don't have permission to save in this location. Contact the administrator to obtain permission. Would you like to
save in the documents folder instead?" I am the administrator. Who else should I contact for permission?