Recover Files from Unreadable SD cards
Expandable storage such as SD card is truly helpful to boost storage capacity for our cell phones or cameras. But they are fragile and when a card stops working, you can lose a lot. We will go through some common causes of SD card failures and share some tips on how to fix it.
1.First, we need to make sure that the SD card is actually at fault. If you’ve inserted an SD card into your laptop or PC’s built-in slot and nothing happens, try using a USB card reader and try different ports. Connect your SD card to another device if you have access to one.
2.Write-protection mode is on. If the files can be read but not be saved, it is probably locked on write-protection mode. Unlock the switch to turn off write-protection.
3. Metal wires in the card slot are corrupted or twisted. Many SD cards support hot plug, which means you can insert or remove the card while the device is still running. But frequent plug and unplug can result in twisted or rusty metal wires in the card slot. Use a needle to straighten the wires if they are bend or remove the rust if they are rusty.
4. SD Card is Not Clean. Dirt or oil stain can cause the SD cards undetectable by computers. Check whether there are dark spots around the metal area of the card. Clean with alcohol or water. Then, dry it out before putting it back to the phone.
5. Card Slot is Squeezed by non-original battery which is too thick to be fit in. Non-original battery may squeeze the card slot and causes problems to the normal use of SD cards. Change back to an original battery to see if the SD cards can work again.
Besides the physical defects, many logical errors could also make your SD card inaccessible. For example, SD cards showing 0 bytes in Disk Manager. Error messages like “You need to format the disk in drive X: before you can use it. Do you want to format it?” or “Drive not formatted. Do you want to format now” may indicate a corrupted partition or corrupted filesystem. You can try to fix the problems by using the Windows chkdsk function. Click Start, select Run and enter “chkdsk drive_letter :/f” (quotes not included). Tab Enter to start the disk check process. You can also try chkdsk /r, which includes the functions of chkdsk /f. It also marks the bad sectors so that these bad sectors will not be used again, which effectively removes the bad sectors from the system.
If you cannot fix the problems by using the chkdsk command, Windows may suggest that you format the unrecognized disks. It will solve most of the problems but you will lose all your files on it during the process. You can always go back to your backup files if available. If not, you can use one of the professional data recovery software to retrieve all your lost files. H Data Recovery Software will help you recover data from USB flash drives or SD cards and it supports recovering various files including photos, music, video, archive, documents, zip files, etc. Here is how we do it with 3 simple steps:
Step1. Insert the USB flash drive or SD card to your computer. Download and install H Data Recovery Software on your computer. Run the software and choose the Flash Memory recovery module.
Step 2. Select the flash memory device that is previously formatted. Click Next to proceed with the scan process. H Data Recovery will scan the memory card and try to find and reconstitute the files. When the scan is complete, you will be able to see the list of all recoverable files. If you act quick enough after the format, the chance of a complete recovery is very high.
Step 3. Select the files you want to restore. Choose a safe directory to export these files.