This is just a card sleeve, no capacity, you need to insert a TF card to use
1. Product model: microSD/TF to short stick/MS Pro Duo card holder
2. Supported capacity: below 64GB
3. Corresponding OS: Win7, WIN8, Vista XP, 2000.Me, Mac OS
9.2, Mac OS X, linux.
4. Length specification: 32mm*20mm*1.6mm
5. Working voltage: 3.2V
6. Adaptation temperature:--20° to 80°
Reminder: If you can’t read the PSP, please format it on the PSP.