OneDrive Microsoft file number restriction
As it turns out, Microsoft did eventually address the file size limitation — raising the 2 GB maximum up to 10 GB. However, Microsoft has not yet done anything about the fact that it maxes out at 20,000 files — and that is why it won’t sync my remaining 2,003 files.
I contacted Microsoft support and confirmed that this is, in fact, still a limitation for OneDrive. It’s a limitation that Microsoft is aware of, and one that Microsoft is working to address in the near future. But, for the time being, your OneDrive account can only handle 20,000 individual files.
You might have unlimited storage capacity with OneDrive, but the 20,000 file limitation is actually much more limiting than the total capacity. It’s true that if you happen to have a library of 20,000 HD movies that are each 5 GB or more, you could use over 100 TB of storage from Microsoft — but as I mentioned earlier, I was only uploading about 80 GB of data, and I exceeded the 20,000 file maximum. Assuming I maintained roughly the same average file size, it would take me over 300,000 files just to use up the 1 TB of storage, never mind unlimited.