BestDuplicator - 1 to 2 Target USB 2.0 Flash Drive Mini 2 Copy Portable USB Duplicator and Tester, Memory Stick Cloner

1 to 2 USB High Speed Duplicator with 4-key control with LCD Can plug in adapters such as Micro SD to USB to duplicate photography pictures into USB

iCopy XS and iCS Decoder From Nikola T. Lab

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Are there any devices that allow large file transferring from an SD card to an external hard drive without a PC? - Quora

Mini USB Plus MKII - 1 to 4 Flash Memory drive Cloner Duplicator – EZ Dupe, Inc.

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DUPLICATE & ERASE USB DRIVES: Standalone 1 to 5 USB drive duplicator / cloner / sanitizer; Ideal for technicians and IT Pros to manage multiple USB

StarTech.com Standalone 1 to 5 USB Flash Drive Duplicator / Cloner / Eraser, Multiple USB Thumb Drive Copier / Sanitizer, System File /

Multiple USB Flash Drive Duplicator/USB Memory Stick Copier & Eraser – Duplicators4All

Hard Drive Duplicator

Mini USB Plus MKII - 1 to 4 Flash Memory drive Cloner Duplicator – EZ Dupe, Inc.