Review on Satechi Type-C Aluminum UHS-II Micro/SD Card Reader Adapter - Compatible with MacBook Air 2020/2018, iPad Pro 2020/2018, MacBook Pro 2019/2018 (Space Gray) by Darius Early

Every cardholder should have these. They are not joking when they say that it can transmit up to 312 Mbps. I was a little skeptical as my other generic SD reader can only write at 20MB/s. I can achieve write speeds of 93MB/s on a Sandisk microSDHC UHS-I MicroSD card, which has a theoretical maximum write speed of 98MB/s with a Satechi high-speed reader. Being able to transfer files between two cards without first copying them to a computer is great too!