So I'm using RStudio and storing my files on Google Drive (the version with folders on your system, acting like Dropbox). I'm using it because it provides a lot more space for free than Dropbox, and I need that space for the projects I'm working on.
When I attempt to write any document at all -- an R script, an RMarkdown file, etc... -- I get the error mentioned in the title. This doesn't happen using Dropbox. I have found answers for this question for Dropbox, but the solution (tell Dropbox not to sync the Rproj file) doesn't seem applicable to Google Drive (if it is, please correct me).
Currently, I'm pausing Google Drive, which is fine, but I often forget to resume it and that causes headaches.
Thanks for your help!
EDIT: On further use of RStudio my solution didn't solve it - The sync popup just occurs at a lower frequency. The problem is that Google Drive currently doesn't have a feature to ignore Folders just filetypes.
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This solved it for me:
.rproj.user
See screenshots below: