I have a 5 year old Seagate external hard drive that was failing to mount to my MacBook. After swapping out USB cables and power supplies, I concluded I had a bad AC adapter. This replacement fulfills my needs splendidly and affordably. I am knocking one star on this review because one of the three included tips was badly molded (see photo) and I would assume possibly dangerous. I didn't need that specific tip for my application, so I will toss it out.
24V 5A 120W ALITOVE Universal Regulated Switching Transformer Adapter AC110V To DC 24V Converter Driver For LED Strip Light CCTV Camera Security System
16 Review
12V 2A 24W UL Listed AC/DC Switching Power Supply Adapter For CCTV Camera LED Strip Light
35 Review
12V 6A 72W AC To DC Power Supply Adapter Converter Regulator With 5.5Mm X 2.1Mm DC Plug, Wall Plug Switch For 5050 LED Strip Lights
17 Review
UL Listed 8FT 9V 1.5A AC/DC Power Adapter - FCC Certified & Compatible W/ Many Models
22 Review