Encrypted SD Card Is No Longer Recognized by the Phone: Can a Clone Recover the Data?
Yes, a full sector-level image is the right first move if the card is still readable enough to image, but the clone still needs the original phone's decryption context. In this r/datarecovery case, a 64GB encrypted microSD card stopped registering in the phone that encrypted it. The user wanted to image the card, write that image to a replacement card, and put the clone back into the original phone. That is a reasonable recovery experiment, but it is not guaranteed to work.
Preserve Both Sides of the Encryption
Do not format the card, reset the phone, remove its security credentials, or try to decrypt the failing original in place. Keep both the source card and the original phone unchanged until you have an image.
Why Won't PhotoRec or Recuva Decrypt the Files?
Recovery software can copy readable sectors, but it cannot replace the phone's encryption key. Android's adoptable-storage design stores the encryption key on the Android device and associates it with the adopted volume. Samsung likewise states that an encrypted microSD card can only be decrypted by the device that encrypted it. If the recovered sectors are still encrypted, another scanner will only recover encrypted data.
What Should You Do Next?
Safest Recovery Path
- Create a full image first: use a sector-level imaging tool such as GNU ddrescue and save the image to a healthy laptop or external drive, not to the failing card. A 64GB source needs more than 64GB of free destination space, so a 32GB USB drive is too small.
- If the image completes: keep the original card offline, write the full image to an equal-size or larger replacement card, and test that clone only in the original phone. A block-level clone preserves volume metadata that a file-by-file copy would lose.
- If the phone recognizes the clone: decrypt or copy the important data off immediately. If it offers to format or initialize the card, cancel.
- If the clone is still not recognized or the image has many unreadable areas: stop cycling through recovery apps. Ordinary software cannot bypass the encryption; specialist recovery would need both the rescued media data and the original phone's decryption context.
Imaging and decryption are two separate problems here: rescue the original sectors first, then see whether the original phone can still unlock an exact clone.