OK, I thought this was a Dropbox problem but I switched to Google Drive and the exact same thing happens. During a long upload (300 GB to GD), upload speed drops to nothing, the usual message about having trouble uploading appears (although I can use Google Drive perfectly normally in a browser, etc.) and, what's even weirder, the cloud usage starts shrinking.
So on this roughly 284 GB upload, local usage is 8.3 GB and cloud usage is 228 GB. So, er where has the other 50-odd GB gone?
I'm starting to think I should be using provider tools now, it seems CloudDrive just does not play well with these providers any more?
Thx,
Ed