Okay, but I thought your desire was to add more storage, and the easiest way to do that is adding another drive, so you still needed to know whether your mainboard would accept one. Otherwise you will need to get a 2TB drive and clone your current drive and replace it. (Of course having two drives will mean having two drive letters in Windows and you'll need to move data and start installing some applications on the second drive manually.) Anyway the UD90 drive should have similar performance to the P3 Plus (better write performance actually and much higher endurance) if you did want to get that drive, either as a second drive or to replace the P3 Plus, or you could go with the T500 and replace the P3 Plus to get the best speed. If you replace it, you could use the P3 Plus in a USB enclosure to do backups.