How to open Seagate ST90000U2-external hdd case & remove drive

"You could measure the size of the 5star or you could be a set of the screwdrivrs.Size Inch point to point [in] Metric point to point [mm]

T1 .031 .81

T2 .036 .93

T10 .107 2.74

T15 .128 3.27

T20 .151 3.86

Looks like very limited availability :) http://www.traderscity.com/board/product...

and http://www.8starshop.com/en/12-in-1-comp... I am also sure that there are many more places that have a set of those. Good Luck to you."

I had a case like that; I believe I was able to remove the screws using a small flat screwdriver that was able to fit tightly enough into the screw head. Once I removed the screws, I replaced them with regular phillips head.

I can confirm that the screws for the casing of the Seagate ST90000U2 external HD are Pentalobe #6. You need a screwdriver PL-6 (Pentalobe #6) for these screws. I got a set of screwdrivers from a German company called Wiha, available on Amazon.