Slow Transfer rate

my passport ultra transfers files slower than the turtle.

i tried to transfer pdf file (25kb size) and it took more than 30 minute. what pissed me off is i tried to transfer one movie with 250mb size and it took more than 4hrs.

any suggestion what needs to be done please

Welcome to the WD Community.

That’s not normal. have you tried using the drive on a different computer or with a different USB cable?

Also test the unit using the DLG tool. 

See if the following link helps

How to test a drive for problems using Data Lifeguard Diagnostics for Windows