USB can work with either SD or TF card simultaneously. SD card and TF card can NOT be read simultaneously, USB can work with either SD or TF card simultaneously. With support for reading and writing 2 cards one by one in USB 2.0 High speed, large capacity up to 2TB, you can easily review files or back up and archive photos and videos compatible with SD, SDHC, SDXC, Micro SD.
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