Just some general comments.
To rip a cd to the INTERNAL drive on laptop depends on the speed of the CD/DVD drive. It's going to take around 8 to 10 minutes a CD I guess on a laptop.
That's putting the file onto your internal HDD.
If you then copy that over to a USB connected drive that takes a lot of time too... can you copy direct to the external drive without putting it on the internal one first ? Dunno.
An audio CD (80 minutes worth) holds 700mb of data approx (0.7gb) If your using a lossless format that file size isn't going to come down much in size.