Power Supply Amperage for External USB Disk Drive Tags: Hard Drives Power Supplies External USB Disk Drive Storage Last response: April 8, 2012 12:12 PM in Storage Share infocorp9 April 8, 2012 12:02:54 PM What amperage range is acceptable for an external usb hard drive? I have three 12 volt power supplies with 1.2amp, 4.0amp and 5.0amp. Are any of them suitable for an external usb hard disk drive? More about : power supply amperage external usb disk drive jsc a c 144 ) Power supply a b G Storage April 8, 2012 12:12:16 PM The larger WD externals ship with a power adapter that provides 1.5 amp at 12 volts. The 1.2 amp PS might work. m 0 l Can't find your answer ? Ask ! Publish Related resources 1TB external hard drive with no power supply, USb 3/seagate /western digital/,ex Forum Use a notebook ac adapter as power supply for external usb hard drive? Forum EXTERNAL USB HARD DRIVE power supply Forum SolvedPower Supply Amperage Forum Solvedexternal hard drive replacement power supply Forum Solvedexternal hard drive replacement power supply Forum SolvedHow to convert sata hdd to usb external hdd without dc power supply Forum SolvedPower Supply Amperage Question Forum Solvedexternal hard drive power supply Forum SolvedDoes amperage matter when buying a new power supply? Forum SolvedPower Supplies, Amperage, Watts, Will this Work? Forum SolvedPower Supply to USB? (Seagate 4TB drive) Forum Seagate 1.5TB External Hard Drive Wrong Power Supply Forum Windows XP External USB drive 'disk is full" Forum External USB Drive Showing in Disk Mgmt, but NOT My Computer...HOW TO FIX? Forum 4TB External USB3 hard drive not visible after power failure Forum SolvedExternal drive without power supply Forum SolvedHow to power external hard drive with usb Forum 1tb external hard disk without external power supply Forum USB External Hard Disk Drive Disappears Forum More resources Read discussions in other Storage categories Hard Drives DVD Drives DVD Writers Optical Media Flash Media NAS/RAID SSD Western Digital !