I always thought that USB bandwidth is sufficient for high transfer rates of 7200 drives and could not find any information about this on the Internet. So, since I believed it will give a huge performance boots for my USB drives I was looking for 7200 drives to put it into the USB case. Now, after I made couple of tests I realized, that it does not make a difference what the rotations per minute rate is if you HDD is relatively new and have transfer rate over 25 MB/s. So conclusion is - don’t buy 7200 drive for your USB storage case hoping that it will be faster than modern 5400 drives. You will not get any noticeable benefit out of it. Here are pictures from HDD Tune test. HDD’s I tested were Samsung SSD PM800 250GB, Western Digital WD3200BEKT, Fujitsu MHZ2250BJ: