What should I do if I cannot read the SD card after I brush my phone? Unable to recognize SD card after flashing

Because my hands were out of control yesterday, I brushed rice pomelo, CyanogenMod10.1, CyanogenMod10.2, CyanogenMod9 and later I was not clear about the specific time when the SD memory card could not be used. Later I tried to use the cards on other people's mobile phones, the card is complete.
It may be because of something written in the card when the machine is flushed or some system bugs that cause compatibility problems.

If the sd memory card cannot be used properly after you brush the rom, try:

If you use someone else's mobile phone or card reader, you can normally read the card. If there is important information in the card, copy it out for backup and format the SD memory card, reload it back to the previously brushed rom mobile phone, and find the trace of the previously unreadable SD memory card in system settings-storage.

Some friends do not want to format the SD card. We can try the following solution (The following is an example of htc G7)

1. First install the G7 driver on your computer. Then download the fastboot tool to your computer.

2. Connect the USB to your computer in fastboot mode, go to CMD on your computer, and enter the Directory of the fastboot file you downloaded to write the following command. Fastboot oem enableqxdm 0 press enter if... OKAY appears, you can press fastboot reboot press Enter.
At this time, the SD card can be identified and the phone will restart the system.

3. Find a card reader to copy the flash _image and mtd0.img files to the SD card and install the super terminal! You can also find Terminal Emulator in the food market to install it! Finally, insert the memory card into your phone! Now we have put flash_image and mtd0.img in the data directory of the mobile phone, and then run the "resurrection" command. What should we do! See the following:

4. Put flash_image and mtd0.img in sd, and install Terminal Emulator on your mobile phone.

In Terminal Emulator, first enter su to obtain the permission, and then enter
Cat/sdcard/flash_image>/data/flash_image
Cat/sdcard/mtd0.img>/data/mtd0.img
Chmod 755/data/flash_image
/Data/flash_image misc/data/mtd0.img

5. Restart your phone to see if the USB connection is back to normal. If there is still a problem, take the third step chmod 755 several times ~ If the USB computer is almost completely recognizable