If you've got a genuine SanDisk and the problem exists, it's been reported by various others. If I were you, I would try the following:
use another SD reader with a different interface, and/or even a different PC (or Mac) to try reading it to rule out defective reader or interface (unlikely)
with the card as-is (i.e. don't format it) try a commercial purpose-built recovery tool like Lexar ImageRescue (try as many as you can). This might not work since these tools work on formatted or corrupted cards (you might be lucky). If that fails, as a probably last resort, try:
format the card in the camera using the Yes, not overwrite (Yes, will just erases the fille allocation table & not the images themselves - this will force a recoverable situation based on no file allocation table), and then try using the above image recovery tool.
don't do any of the above, and contact Leica customer support & maybe they'll take on the recovery of your SD images as part of an investigation.
Please make your choice, without holding me responsible
Additionally, (hopefully after you get back your images) I would also suggest a card (write/read) test as I outline in my blog (in sig below). Note this will completelly erase your card. This will prove the card is not defective, and indicate another issue.
Good luck - but sorry to say, I am not optimistic given the extend of the damage.
- Canon EOS M58.8%
- Panasonic G85/G803.3%
- Panasonic FZ2500/FZ20001.9%
- Panasonic LX10/LX151.2%
- Panasonic GH5 development3.6%
- Sony a99 II15.9%
- Nikon KeyMission 170 and 801.0%
- Fujifilm GFX 50S development28.3%
- Olympus E-M1 II development18.7%
- Olympus E-PL80.1%
- Olympus 25mm F1.2 Pro1.5%
- Olympus 12-100mm F4 IS Pro1.9%
- Olympus 30mm F3.5 Macro0.1%
- Sigma 85mm F1.4 Art3.6%
- Sigma 12-24mm F4 Art2.6%
- Sigma 500mm F4 DG OS HSM Sport2.4%
- YI M12.2%
- GoPro Hero50.8%
- GoPro Karma drone2.2%
|Sadiqur_Rahman by Sadiqur Rahman|
from Ain't Going to Work on Maggie's Farm no More
|Airborne by John Beavin|
from - How to respect the Flag and Anthem - (Portrait in Full Colours + A Border)