Transcend Hard disk - 4TB External Storage Transcend Hard Disk-4TB External StoreJet® 25H3 is available in Nairobi Kenya, at Ace Tech Pro LTD. Buy this Transcend Hard Disk – 4TB External StoreJet® 25H3 at the best price. We deliver across Kenya and beyond. The StoreJet 25H3 portable hard drive combines the superior performance of USB 3.0, vast storage space, eye-catching enclosure, and a three-stage shock protection system that meets U.S. military drop-test standards.