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The Transcend ESD420C is a 1 TB external SSD that connects over USB-C and has a magnet on the back so it can snap onto the back of a MagSafe iPhone or a metal surface. It uses the USB 10Gbps interface, so sequential transfers run in the same class as other 10Gbps portable SSDs, not the faster USB 20Gbps or Thunderbolt drives. It suits iPhone owners who record ProRes video and want storage that rides along on the phone, and anyone who wants a small metal-cased drive for laptop backups. Reviewers like the magnetic mounting and the compact build; the main complaints are that it is not the fastest drive in its class and that the magnet only helps with MagSafe-compatible phones.
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Lowest price we've seen: $266.64 on Nov 9 at Newegg. Tracked across 1 store since Nov 9.
Owners of the ESD420C mostly praise the magnetic mount and the small metal body, and say it works well for recording video straight to the drive from an iPhone. The common criticism is speed: it is a 10Gbps drive, so it trails newer USB 20Gbps models on large transfers.
