How can I save my turbotax file?

[Andrewtoo]

I get  message to say that Turbotax could not save my file. I have tried turing off Controlled Folder Access as suggested in a previous question, but, it was not turned on in the first place. I did try turning it on and adding tt2018.exe as a trusted program, but, that did not change anything. I do not want to lose the changes that I made to the file. I also tried saving it to a different location, but, again no luck.

[carolgib2014]

I always save my file to an external thumb drive--in fact two of them.
Nothing but TTax is resident on my computer.  I have always used the "Save as"
and it has always been successful.

I have never run into that problem.

[Andrewtoo]

I tried to save on an SD card, but, I get the same message.

[Andrewtoo]

I am able to save to a copy of my taxes to a PDF form in the same location that I am trying to write the tt18 file to without success