I saw someone asked raw Sandisk memory card data rescue in the forum, I have the same experience and I want to share it with him. But I don’t know why I can not reply to him. So I just have to start a new discussion. Here is my way to recover data from the raw memory card:
Step1. Download and install the data recovery software on the computer.
Step2. Connect the problematic memory card which is in raw error to the same computer by inserting it to a card reader.
Step3. Run the data recovery tool on the computer. We can choose a recovery model to save time and then select the aim disk to scan.
Step4. We can also preview the recoverable files in the list after the scan. Preview them and pick up the needed to recover.
Step5. Select one of the computer hard disks available as the location to save files to be restored.