Rocketek Aluminum USB 3.0 Portable Memory Card Reader Adapter for Micro SD Card/TF Card Reader Adapter

I've had this thing for years. Still works with no issues. Was a lifesaver having a pc without a card reader, and a printer that would no longer connect wired or tirelessly to pc, AND only had a memory card slot to direct print.

great & functional, i don’t have any complaints, i love how it folds to make it more compact, super simple

I installed a 256GB and a 64GB MicroSD and copied some stuff from my hard drive as a backup. I didn't have any issues. Now as for "speed"... well any techie who really knows anything about computers will tell you it all depends!!!I installed this on a Linux laptop running quad core i7's and get an incredibly fast copy time using 'dd' with large block size copyI installed it in an old Intel desktop that has a USB-3 PCI card and get different but more than acceptable results... I tested it using a USB-2 port and of course it was way slower. That's NOT the adapter's faultI installed it in my Gaming desktop set at turbo mode in a USB3.2 port and get very fast speeds...And what else makes a difference??? The MicroSD card itself!!! I used SanDisks Ultra Plus - 64GB and 128GB cards. I've got other branded MicroSD cards which are much slower than SanDisk... so my quoting numbers is pointless because it all depends on so many variables, If you copy 1GB of 1,000 small files it will take much longer than copying a single 1GB file. It also depends on the block size that the copying software uses.... copying at 4kB blocks at a time will take considerably longer than copying using a block size of 64kB... So that's why I won't quote the speeds???Bottom line, I found in my environment it works for what I need it at speeds I'm more than happy with. I also like the size and it's easy to grasp to insert/remove.

Small, compact, short wire; does the job. However, has issues with passthrough. Have to remove and reinsert my smart card for it to be recognized.

I’ve used this for a couple of months now to process pay and orders from home. Haven’t had any issues with it.

First purchased one of these in August, 2022. Then I bought another in July 2023. Then another in August 2023. And another in February 2024. And finally another in May 2024.Why do I have so many? Well, the technical reason is because they're perfect for maintaining daily backups (bootable, the entire disk) of the Raspberry Pi's I have around the house (and one on a Pi I built out for a relative). And one for just general usage when I need to access a micro-sd card (like the one from my critter cam).They're perfect. I never bothered to verify their speed, mainly because even with USB 3.0 things rarely move very fast in relative terms.Yes, they do get very warm, particularly when plugged into a Raspberry Pi, as they are all metal so act as an unintended heatsink. A napkin or tissue wrapped around it while removing it is all you need if it's too hot for delicate fingers, not a big deal. When sitting idle in a PC USB port, it's slightly warm, not hot.I just ran CrystalDiskMark on one, I've no idea if the numbers (in the attached photo) are good or bad, but the limiting factor will likely always be the Micro-SD card, not this reader.Review summary: Great!

This wouldn't work for my computer. All other smart card readers I used with the same card and same computer did work so it is something wrong with this specific reader.

This adapter does work, but the design can be a tight fit for some USB sockets. If you have a fragile socket, I can't recommend this. If you can push a bit hard to connect it, it's a good option.