I have an ATA internal drive I use as back up and it shows fine on windows 7 32 bit but not on the 64 bit? It shows in the listed devices as active and I can populate it but it won't show in explorer or my computer so I can access files on it.
Thanks for your help.
You might need to allocate it a designated letter.
Control Panel (icon view) - Administrative tools - Computer Management - Disk Management.
Right click the partition (If it does not have a letter) select Change drive letters and paths, and follow the instructions.