itunes shows space on iphone but won't sync
My itunes shows 2.24GB of free space on my phone, but when I go to sync, I get a message that says,
The iPhone cannot be synced because there is not enough free space to hold all of the selected items (additional 278.2 required).
When I hit OK, the sync process stops and the status bar at the bottom shows 1.62GB free space.
It's an iphone 4 with 7.1.2, and I'm running itunes 12.1.0.71 64-bit on Windows 7 through USB.
Any suggestions?
Thanks!
John
iPhone 4, iOS 7.1.2