Hello, see below:
http://technet.microsoft.com/EN-US/library/dn232145.aspx
The SkyDrive Pro Windows Sync client limits the total number of items that you may synchronize with a document library. The following limits are the synchronization limits of the SkyDrive Pro Windows Sync client:
You can synchronize up to a maximum of 20,000 items in your SkyDrive Pro document library, which includes folders and files.
You can sync up to a maximum of 5,000 items in other document libraries, which includes folders and files.
In any library, you can download files up to a maximum file size of 2 GB.
My question is, is the 5000 items mentioned "per account" or "per library"?
Best Regards,
Antti Ojanen