Apologies for venting a little but, I’ve installed Insync on three Windows 7 machines (actually one is 8.1) and it doesn’t work. There are just too many errors that block progress such as random permission denied messages, the above failure and insync not removing deleted files. The result has been utter chaos. This has worked on my Mac for so long and so well yet on Windows, it’s just all over the place.
To answer your question, I had to un-install isync, remove all files and re-install GD and allow it to re-sync the 30,000 files (13GB).
Let me know if we can salvage the situation - I have an angry COO and CFO so must tread very carefully.