There's no almost about it. They are all scams 100%. The most popular are SD cards with a USB adapter fitted in various housings. The internal adapter or SD car

There's no almost about it. They are all scams 100%. The most popular are SD cards with a USB adapter fitted in various housings. The internal adapter or SD cards are modified to do various things like report much larger sizes, allow phantom writes, or even install malware. They can also potentially burn your house down. Search "SD card caught on fire"