Just an update: My SD card gave in completely last night! :crying: It worked fine after formatting, without any errors, until it just stopped working, so I lost a few days of pictures. Anyway, the SD card isn't even being read in my laptop, so it's definitely a goner. The third is that the card reader is not working properly. If you are getting an SD card detection error, you should first check to make sure that the SD card is properly inserted into the card reader. If the card is inserted correctly, try removing the card and then reinserting it. If the card is still not detected, try using a different card How to test the read/write speed of a possibly fake SD card. Make sure your interface and card reader are both fast enough to allow the SD card to run at the highest speeds. You can check the read/write speed by copying a large video file (1-2GB) to the card to see if it is unacceptably slow. Or you can use a free tool to check the SD card If the SD card isn’t detected in Settings, remove and re-insert the SD card. Once it's detected in Settings, follow the steps listed below to format the SD card to portable. If the SD card is recognized in Settings but not in Files by Google, that SD card might be formatted as internal storage. Right click the SD card and select “Properties”. Find the “Update Driver” option under the “Driver” tab. Tap on “Update driver”. 8. Reinstall the Universal Serial Bus Controllers Driver. Reinstalling the Universal serial bus controllers driver can also help you fix the SD card not showing up on Windows 10/11 issue. To do so, search for Device Manager via the search box on the taskbar. Once you click on it, you’ll see a list of devices. Find your SD card, right-click on it and choose to Update driver. You’ll see two options. Choose the one that allows to automatically search for the driver. It won’t take too long to learn if Windows was able to find Use a Different SIM Card with your Huawei P10 . If cleaning or replacing the SIM card did not solve the problem, try using a different SIM card. Borrow a SIM card from a friend or family member and insert it into the device. If the device is able to connect to the network with the new SIM card, then the problem is likely with the original SIM card. Step 1. Open Disk Management in Windows 10/8/7 by going to This PC/My Computer > Manage > Disk Management. Step 2. Locate and right-click on the SD card, and choose "Format". Step 3. Choose a proper file system like FAT32, NTFS, exFAT, and tick "Perform a quick format". Outdate driver can be the reason for PNY SD card not showing up in Windows as well. If so, do as follow: 1. Press Windows + R to open Run window at the same time, type devmgmt.msc, and hit Enter key. 2. Expand disk drive, right-click PNY SD card device, and select Update Driver Software among the given list. 3. Q: Can incorrect SIM card placement cause detection issues? A: Yes, ensure the SIM card is properly inserted into the designated tray, with the correct orientation. Common Reasons Behind SIM Card Not Detected Device and Software Issues. One of the most common causes of SIM card errors not being detected on Huawei Mate 20 is device and software NC9RUyo.