My server's storage seems to not be migrating data to other drives correctly. My original 80GB hdd is the OS drive and i just added 2x 1TB drives for storage. In the 2 weeks since the addition, several 'balances' have taken place but my primary drive is at 99% capacity. Most of this space is just file storage that should be transferred to the other drives but isn't.
Can somebody explain a solution?
WHS doesn't "balance" anything. That is a term used to represent Drive Extender is checking the status of the files and making sure they are duped where appropriate. Frankly, I wouldn't worry about how much space is used on any drive. But, if you really want to get the data to move, you should move the files from the server to a client, then put them back again. When you re-add the data, it will go to one of your secondary drives.