Difference between external hard drive with power supply and without it Tags: Hard Drives Power Supplies External Hard Drive Storage Last response: December 25, 2012 9:38 PM in Storage Share finme December 25, 2012 3:58:48 PM Hello, I would like to know if it's better to buy an external hard drive without power supply, the hd wil het power fromthe usb port. More about : difference external hard drive power supply RealBeast a c 229 G Storage December 25, 2012 9:38:07 PM Both work fine, but if you want a larger faster 3.5 inch drive you need an external power supply. The smaller 2.5 inch externals will work off USB power. Not really a better question, just one of what you need in terms of drive size and form factor. Can't find your answer ? Ask ! Publish Related resources: ForumWd 500gb external hard drive wrong power supply ForumExternal hard disk with and without power adapter ForumExternal drive without power supply ForumExternal hard drive power adapter ForumCan I add a second hard drive with a different operating system without creating ForumPower supply for 14 hard drives + Core2Quad Forum1TB external hard drive with no power supply , USb 3/seagate /western digital/,ex ForumIneed to know what kind of power supply i need for my fantom external hard driv ForumHard Drive Intermittently not Booting from External Enclosure ForumPower supply for Maxtor OneTouch Plus 4 External HDD ForumExternal hard drive power cord ForumExternal hard drive prices Forum1TB external hard drive with no power cord required (runs on USB 2.0) Forum4tb hdd is being read as 2tb hdd ForumTransfer files from Harddrive to usb drive. ForumTransfer files from Harddrive to usb drive. ForumDVD drive not working on the same IDE cable as HDD ForumAdata ch94 not working with mac ForumI am unable to view my hard disk contents it had very important data please help ForumGet data from damaged hard desk drive More resources Read discussions in other Storage categories Hard Drives DVD Drives DVD Writers Optical Media Flash Media NAS/RAID SSD Western Digital !