….might I ask which separate drive do you use?
Yes. I use a Mercury On-the-Go Pro from
Other World Computing. The drive is extremely well built and was simply 'plug it in and it works' - and it has worked flawlessly since. I like the size and I like the fact that it is 'bus powered', which means it does not need to get power from a wall socket - the computer provides it.
I am a careful shopper and had done all the homework prior to purchase, finding that a lot of people recommended Other World Computing not only for their products but also for the quality of their service. When I spent time on the phone with their chat folks, I found they were very informative without being the least bit pushy.