What I need from your expertise is what is the best value?
I'm not sure what you mean by value. Value to me is based on my needs and what I can afford to get at that time.
Should I get internal or external
This is the easiest of all your questions to answer. You said in your first post:
I would like 2TB. I would prefer external but I heard internal are cheaper.
I gave you a option on where to buy the external since that is what you you mentioned you wanted.
Yes Internal is cheaper in most cases but the mobile aspect is what you mentioned at the end of your first post.
Ideally I'd like an external I can use for both my mac and my pc, but if not, then I can put it in the PC and transfer manually...
Which company is best?
This you will hear different opinions depending on who you talk to.
I myself like Western Digital Black drives. Maybe not the fastest but they are made to last since WD sells them as their work horse drives.
What about data transfer rates? And RPM
7200 is the standard rpm now for the newest drives unless you want a SSD drive which is faster. With that faster speed you also will pay a premium price. Another tidbit of information is these SSD drives come in smaller capacity drives at the moment.
The more cache memory you can get on the drive the better the transfer rate.
So to answer your questions more directly:
I prefer WD drives so I would choose this one HERE
Even though it is not part of their Black Series
of drives it comes with some good software.
It is a USB 2.0 connection between the drive and the system so it should work with almost any system out there now.
If you want to be able to share your info with other systems then go with a external. If your privacy is more important then go with a internal.
If you want to use the drive also as a backup for data along with your videos then I would go with a external.
I myself have 3 drives in my system.
My main drive is split into 3 equal partitions where I run run 3 different OS's
I have a 1 gig HD for my music and games on. I have about a thousand songs on it and about 12 games fully installed and not even 150 gigs used on it at this point
My other drive is a 1 gig for my digital backups which is now about 400 and I have used 350 gigs on that drive.
My point is a 2 tb drive is great but with that much space you would be smarter buying 2 x 1 tb drives and have one as backup and one for what you intend to use it for. This way if something happened to your main drive you would always have a second copy of your data.