Integral Micro SD USB3.0/USB-C Type-C OTG Memory Card Reader Adapter- Super Fast Transfer Speeds, Plug & Play and Compatible with microSDXC / microSDHC UHS-I U1 & U3

It's a tiny metal UHS-I microSD card reader which supports the unofficial UHS-I DDR208 extension, which means it can only achieve its headline 180 MB/s speed if your microSD card also supports this unofficial extension.UHS-I (Ultra High Speed, I) uses a single row of pins and officially only supports 104 MB/s. If the card and its reader both support the unofficial DDR208 extension then they support 180 MB/s. Which is to say that's the upper limit. Real world read speeds will depend on the card's internal storage.UHS-II has an extra row of pins, and supports up to 312 MB/s.So if you have a UHS-II card which really can be read at 300 MB/s, as I do, but plug it into this device it falls back to UHS-I and you may experience 180 MB/s, or 104 MB/s. It depends on the card. In my case my fancy microSD card only achieved 90 MB/s (both read and write).I really liked how sturdy this reader felt, and the how the metal case allows the heat from writing the card to escape (one of my cards reaches 104ºC when writing to it at 90 MB/s according to my FLIR camera). Ultimately I returned it because I mistook it for a UHS-II card reader, which it is not.

This looks so cheap and nasty, that I was quite surprised that it was able to read at 165MBs and write at 115MBs (with a sandisk extreme micro sdxc card)

Very good reliable cards, I,ve got them in phone, action cams and my dslr,s as well as my evil cameras, never had a glitch with any of them been using integral cards since buying their cf cards for my early dslr,s and they still work 15years later, so hopefully these will also. No probs from me.

I tried this on my pocket 6k and recorded 6K Braw on Q3 and it works flawlessly. Lower compression than that, the frame drops but 6k Q3 for me is more than enough. Prores 4k, 2k and 1080p works all good without dropping of frame. Best buy this year.

for the price of the card it’s good enough for what i got it for. it’s not as fast of a san disk. but there £55. so with all of that counted in i’d recommend it. it dose the job

The Micro-SD card hangs out a lot, making it possible to mechanically break it if not handled correctly. The rounded edges makes it difficult to be extracted from the USB port of the computer. More user oriented mechanical design would have made this a perfect device.Other than this, the reader is very fast, compact, mechanically strong, and at a very good price.

I purchased this Integral micro SD card to replace my Blackvue dashcam SD card which has hardly ever worked since i purchased the camera - i constantly heard the camera say 'check SD card' and it was becoming more and more frequent and frustrating! A lot of SD cards do not work with Blackvue dashcams (I have the DVR750S. When you insert the card into the dash cam you MUST perform a format in the dash cam itself otherwise it will not be recognised by the camera. Now i have no more voice announcements stating 'check SD card'.Great product works well with Blackvue products

Useful compact metal microSD card case and two fast microSD cards. Case has room for three SD card adapters plus twelve microSD cards. Inserted into my PC's USB2 SD reader, measured over 1GB using H2testw v1.4, write speed is approx 29MBytes/Sec and read speed is approx 12MBytes/Sec. So the write speed of these U3 cards is about three times the write speed of U1 cards.