Backing up SD card data is easy—the most difficult part is remembering to do so on a regular basis. The good news is that there are various data backup tools that make the process quick and easy. For example, you can use the byte-to-byte backup feature included in Disk Drill, which lets you create a single image containing all data stored on your SD card:
Connect your SD card to your computer.
Insert the SD card you want to back up into your computer’s memory card reader.
Launch Disk Drill and select the Drive Backup feature.
Pick the partition you would like to back up and click the Byte-to-byte Backup button.
Specify the backup destination and confirm.