flash drive with sd card slot
Thumb Drive Storage Case | eBay
Large Capacity USB Flash Thumb Drive Case: USB memory stick storage organizer can hold 44 USB flash drive, also come with 9 elastic slots for SD SDXC SDHC ...
Amazon.com: 53 Slots USB and SD Card Case for 18 Flash 8 Mini ...
A few examples of flash memory form factors that are NOT presented in a thumb drive format are SD Cards, credit card drives, and external portable SSD drives.
Nintendo 3DS Memory Cards for sale
Sandisk 32GB SD SDHC Flash Memory Card for Nintendo 3DS N3DS DS DSI & Wii Media Kit, Nikon SLR Coolpix Camera, Kodak Easyshare, Canon Powershot, Canon EOS, Comes with Bonus SD/TF USB Card Reader.