Different interfaces. For details, you may start with the articles in the Wikipedia.
Actually I have a 5,25 external box USB 2.0, I can "recycle" and use with a new driver?
The connector is IDE - PATA
Yes you can (For drive vs. driver, see geno's remark :bigsmile:
Actually there is some that produces PATA Writer?
There are a few PATA drives still available. LG's GH22xP series is extremely picky with its interface (at least my own drive is), so installing them in an external enclosure is something like gambling.
Samsung's 22x drives are mediocre, and Liteon's CD performance isn't brilliant either
So getting an older model isn't a bad idea at all. Optiarc AD720xA, Pioneer DVR-115, -116 would be good choices. If you can get one.