Memory cards are useful. Here I happened to test the 128GB Class 3 and it worked as advertised. Actually, I had to get a card reader that supports USB 3 first. And I also noticed that some of my USB 3 ports are not version 3. Grrr. In any case, tests on various Win10 PCs gave almost claimed read and write speeds (100/85). See diagrams. USB 2 was of course much slower. As with most storage devices, the questionable part is how long they will last. Will you check back in a few years? Meanwhile, $20 is in the mid-range for a 128GB Class 3 SD. I don't see anything wrong here.
SmartBuy Classic Series microSDHC 32 GB Class 10, R/W 25/30 MB/s, SD adapter
41 Review
32GB High-Speed Micro SDHC Card - Class 10 UHS-I Compatible Memory Card for SD Devices
63 Review
Kingston microSDXC 64GB Class 10, V10, A1, UHS-I U1, R 100MB/s Memory Card, SD Adapter, 1 pc, Black
45 Review
Smartphone Xiaomi Mi 8 Lite 6/128 GB, midnight black
70 Review
Logitech HD Webcam C270: Crisp 720p Widescreen Video Calling & Recording (960-000694), Lightweight and Portable at 3.15 lb.
192 Review
Sennheiser PC 8 2 Cancelling Microphone
71 Review
Smartphone Samsung Galaxy A50 4/64 GB, 2 SIM, black
82 Review
Renewed Logitech G PRO X Wireless Lightspeed Gaming Headset with Blue VO!CE Mic Filter for Immersive Gaming Experience
122 Review