Removing storage HDD 'system drive' attribute

[Charlie98]

For a while, I had a small boot SSD and a 500GB HDD for media, game files and whatnot... both drives were 'system' drives. Now that I have a bigger SSD, I'm migrating everything to the SSD... I don't need or want the old HDD as a 'system' drive. Is there a way to drop that out of the system and just use it as a basic storage disk, or do I need to reformat it or something? I poked around in Disk Manager but didn't see anything obvious... I thought I should ask before I screw something up...

 

[postmortemIA]

system means bootloader is installer there. If you can install and configure bootloader to your bigger SSD, then you can get rid of the old HD. Otherwise, you can't boot without that drive.

 

[Charlie98]

system means bootloader is installer there. If you can install and configure bootloader to your bigger SSD, then you can get rid of the old HD. Otherwise, you can't boot without that drive.

After I cloned the new SSD (I unhooked everything except the two SSDs) the new SSD booted to W7 fine... without the spinner. Windows does use the HDD as the temp storage location (for the internet, etc.)

Is there any way to view what's on this thing? I have everything else off of it, but it's still showing about 7GB used.