Cannot re-save after making changes to a PDF

My Cloud OS 3 Personal & Network Attached Storage My Cloud
1

I’m trying to use the WD Mycloud as a shared drive. When trying to re-save and overwrite the existing file with changes, I get the following error:

WDMyCloudError

(For future Googlers/searchers the error states: The document could not be saved. The file may be read-only, or another user may have it open. Please save the document with a different name or a different folder.)

This has happened with Windows 8.1, and 10 on my computer, and Windows 7 on my colleague’s.

Nobody else has the file open, just me.

PLEASE HELP!

2

Did you google that error?  There’s tons of stuff talking about that error with Acrobat…

3

The error does not occur when saving locally. As it only happens when saving to the MyCoud, I presumed that was where the problem lies.

EDIT: I just tried saving locally SPECIFICALLY NOT using the fixes for the Adobe problem I saw online (preview pane open, explorer window open etc.) and I cannot replicate the problem.