iscsi initiator & volumne

So I have x2 HDD's in a Raid config in a netgear storage box.  I have created a iscsi connection between that data to show up as a volume with mapping of B: (backups) and it is 2.7TB in size.  I have been pointing my backups to that target for almost a year.  Backups are failing and I noticed that the reason is because there is not enough space.  The drive is now empty but says there are 800gb used but I cannot find it!  Anybody have ideas on this or used a similar method?
tlebeau84Asked:
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Pradeep DubeyConsultantCommented:
Have you checked for  System Restore and Shadow Copies on that volume?

Use TreeSize to find out what left in the drive.
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tlebeau84Author Commented:
I did.  This is on the Host server so I have no shadow copies on it.  I ended up just reformatting the iscsi drive and keeping the same name.  Now it is back to 2.7TB so backups should just pick back up.  I really need to find a more solid Hyper V backup method!
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Pradeep DubeyConsultantCommented:
you can use storagecraft backup solution, its easy to use and other good features like file restore/consolidation of backup images.

It can be used to save backup files to a network location and by doing so you don't have to map drive.
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tlebeau84Author Commented:
Thank you for your time and help!  I will check that out.
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Windows Server 2008

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