How do I change the letter of a former internal HD (C:) to something else, it's now ext.connected to new comp?

I removed an internal hard drive (C:) from and older computer, bought an enclosure, and connected it to my new computer which already has a C: hard drive. I set the old drive to 'slave' before I installed it in the enclosure, so I think the problem is that the old drive id still calling itself C: in conflict with the new internal hard drive. Is this problem, how can I change it if it is? If not then what are some suggestions to troubleshoot?

How do I change the letter of a former internal HD (C:) to something else, it's now ext.connected to new comp?
The drive letters get set by the operating system, not the drives themselves, that's not the issue. The problem with plugging it in externally is that it uses a different file system. If you had windows on it, it'll typically use FAT32 or NTSC, and external drives use Linux partitioning - Ext2 or Ext3, so you need to back it up by plugging it in as slave inside the PC again (IF you have any data you need saved only, otherwise, skip this), and then format it using the enclosure's utility, then it'll become useable.


P.S.


In a single drive enclosure, the drive always needs to be set as "Master". It won't conflict with your other "Master" drive, since they are not on the same IDE cable.
Reply:Use the Windows Disk Management tool. You can access the Disk Management tool easily from any Admin-level account.


Click "Start/Control Panel/Performance" and "Maintenance/Administrative Tools/Computer Management."





When the Computer Management interface opens, look in the left-hand pane under "Storage" and click on "Disk Management.





All of the drives will be shown that are connected to the computer will be shown, including the drive letters.





Just Right-click on the drive you want to change letters on. A popup list will show all available letters. Choose one you like and reboot.