Can you drag it into that window?
It is partitioned HFS+ right?
Tried dragging it but didn't work.
Time Machine? It's one, not partitioned...and I think HFS +
Disk Utility says:
Disk Description : Seagate Expansion Media Total Capacity : 2 TB (2,000,398,933,504 Bytes)
Connection Bus : USB Write Status : Read/Write
Connection Type : External S.M.A.R.T. Status : Not Supported
USB Serial Number : NA4BH25G Partition Map Scheme : GUID Partition Table