microSD UHS-II Dual-Slot Memory Card Reader by ProGrade Digital (PG07) | USB 3.2 Gen 2 for Professional Filmmakers, Photographers & Content Creators

I purchased the dual MicroSD card version to try and cut the time it takes me to transfer video from two GoPro cameras I use to record my motorcycle riding days. When I go on multi-day tours, it would take significant time to transfer video at the end of each day when I reach my destination hotel.To determine value of spending not inconsiderable amount on money on this gadget, I tested its performance immediately on arrival (30 minutes ago) and here is what I found.Transferring video from a single MicroSD card (SanDisk Extreme 256GB A2) average transfer speed to a MBPro (late 2016) onto the on-board SSD was 54MB/sec. This represents 3 times transfer speed compared to low cost card reader I used to date.This result in good. Not great. I expected it to get closer to advertised 100MB/sec to 120MB/sec which would make it great. 3x faster transfer is good, even very good but short of great.Second test was transferring from 2 MicroSD cards at the same time. I used identical MicroSD cards (again, SanDisk Extreme 256GB A2), each with 30GB of GoPro video.THIS IS WHERE THIS CARD READER SHOWED WHY IT COSTS SO MUCH.Average transfer speed was 61.9MB/sec for the first transfer and 62MB/sec for the second transfer.Why the individual speed of dual transfer is higher than speed of a single transfer I cannot tell but this result moved it from good to very good, to great.I am looking forward to 2021 touring season where I expect to be able to reduce my video copying time from 8 hours each night to 1 hour 30 minutes (512GB transfer at 55MB/sec vs 17MB/sec).

Got to admit I was very skeptical at first looking at the price and it's size but now that I have used it this thing is amazing it is fast and I mean really fast it transfers files to micro sd as if they are actual hard disks so much so that it puts other micro sd readers to real shame with their slow mediocre transfer speeds.With a powerful magnetic base it can be attached to the side of the computer case or any metal surface so it will stay secure and out of the way at the same time, it's activity led Is also useful to know when the file transfer is being made and or when it's finished particularly for a large file transfer.It is pricey but it honestly is worth every penny because it is genuinely that damn fast.If you work with or transfer files to micro sd, get it you would not regret it.

Wer regelmäßig viele MicroSD Karten entleeren muss wird das Gerät lieben. An meinem Laptop kopieren zwei Karten parallel mit 90MB/s und das wohl auch nur weil die Karten nicht mehr können.Besser sein könnte noch das entfernen der Karten. Im Betrieb stehen die Karten ein paar mm raus und an diesem Zipfel muss man sie auch herausziehen. Nicht unmöglich auch mit größeren Händen aber nicht gerade bequem.

poor quality - 8 months of office-only use - and it does not work (different computers/phones, cables - it is dead).No customer service or support - ProGrade does not respond to online or email customer service request.

As advertised speeds, expensive for what it is