1) My memory card does not appear in the file explorer when it is connected to the card reader integrated in the PC:

- Check that the card reader drivers are installed or updated on your PC.
- Test the memory card on another computer or on an external card reader (USB).
If the problem is not with the computer or the card reader, please return the memory card to your dealer with proof of purchase to be covered under warranty.

2) Reading or writing speed seems slow:

Check that your card reader allows the maximum speed of your memory card. Card reader speeds are indicated on the card reader or its documentation as HS or UHS logo. See below

1. High Speed ( standard ) : 25 MB/s
2. UHS-I : 104 MB/s
3. UHS-II : 312 MB/s
4. UHS-III : 624 MB/s

3) I can't write on my SD card
SD cards have a latch to protect them from being written to.
Check that the memory card is unlocked.