A couple of questions re replacing the hdd in a Tivo HD

I have a Tivo HD upgraded with a 1TB hdd using WinMFS and a dual docking station. Am I correct in my understanding that I can copy the 1TB drive onto a 2TB drive using JMFS but not with the dual docking station? Can I use two sata to usb adapters since my slim form desktop does not have any available sata ports?

If I chose to stick with 1TB, can I use the dual docking station and WinMFS to copy the old 1TB drive onto a new 1TB drive?

TIA for any info.