Stupid amount of money for it. Best way is to get a harddrive for the Amiga. Plug it into your PC transfer loads of ADF's using Winuae. Plug back into Amiga and use an Amiga program to write the ADF's back to disk. Best and quickest method I reckon
You might already have one but you can get 6gig laptop drives from around £5 posted on fleabay.