SD card not recognized

[Frank Fremerey]

Sorry. This is a Micro SD card. There is no slider.

And: No low level format possible. No formatting possible, not partitioning possible. Completely utterly f*u*c*k*e*d

http://www.kohl.de/webshop/8919/sandisk-ultra-microsdxc-64gb-fuer-helmkamera/actioncam?gclid=CN7k1vnu780CFeYK0wodMsQPRQ

Interesting is, that it is READABLE in my smartphone and no where else. WRITABLE or DELETABLE it is not.

I tried to figure out where I bought it. As far as my boooks go, I must have bought it from amazon. But the only card of that type I got from amazon was sent back and refunded.

It is the one mystery card that came from hell to fry my brains....

[charlie]

Low grade mystery solved.
 
The tiny ridge that the arrow is pointing to on right side card presses down on a tiny sensor that lets the camera know the card has been inserted. It has broken off of the card on the left so the camera is unaware of its whereabouts. More proof of the fragility of these little cards I suppose.

With some fine tipped tweezers I was able to press down the little sensing tab inside the memory card slot of the D800 as well as the LX5 and both reacted as though a card had been inserted. Card readers do not have this "feature".

[PedroS]

Thanks, good to know

[Bjørn Rørslett]

Frank: even if the micro SD card has no tab, probably the adapter for it has one.

Charlie: another case for SuperGlue judiciously applied.

[Frank Fremerey]

The adapter has one.

But it does not make a difference.

when lock is on  the computer says: "write protection"

When lock is off the linux computer says "formatting" "formatting done"

And a second later "unformatted"

In Windows the Expolrer says the card has a capacity of 0.99 MB

In "Datenträgerverwaltung" it says the card is 59.56GB but does
not allow formatting.

In Android it looks as if I can execute all operations. Then, after
a few seconds or Reboot, all Data is there as if nothig had happened.

If I attach the phone to the computer I can extract all Data via
"Move" .. the card seems to be empty and is officially
announced to be empty.

suddenly all data pop up again

There are two other such cases on the web but no solution.

[Bjørn Rørslett]

Aha, the infamous 32GB/FAT32 barrier. Quite bizarre actually as Windows can support FAT32 file systems up to 2 TB or something.  Windows performs the formatting as specified, then at the end of the writing refuses to complete the operation and says the card is not formatted at all ...

There are facilities (of Linux-origin if memory serves) for formatting devices with capacity > 32 GB. I used them frequently some years ago when cameras could have trouble dealing with 32 and 64 GB cards. In recent years the issue with such capacities apparently vanished into thin air.

[Frank Fremerey]

In linux I can format the card to reiser fs or ext4 or whatever hafs+

You name it. I "can do it"

It says done and after next check shows the frozen previous state

cameras say the card cannot be formatted or the card is broken and has to be replaced.

My solution was to never buy Sandisk anymore and get another of these great 64GB
Samsung Pro+ with 95MB/s Speed grade that is actually delivered to promise.

This is the third Sandisk breaking on me in a year. I am done.

Before that the only card breaking was a Transcend 16GB CF.

I did never touch a Teanscend again. Lost pictures. Nono.

From 2005 till 2015 all my cards were Sandisk an all worked very reliably.

[Bjørn Rørslett]

The digital cameras need FAT32 for the cards. They don't understand anything else.

[Frank Fremerey]

I do not think so. ExFAT should be the choice for cards
above 32GB. And it sure should be for any sdxc.

[Bjørn Rørslett]

It's just a matter of naming convention. exFat is the same as FAT32 as far as I know.

You can format say a 512 GB disk in Windows (with the third-party facilities) as FAT32 and have Linux recognise it as exFAT. At least that is what I remember from the last time I did this, a few years back in time.

[Frank Fremerey]

If it works all is good. I tend to format all cards in the devices I use them in.

Crazy thing about the MicroSD is that she worked for a long time in all machines.

Then suddenly she entered the frozen state I cannot identify.

[Frank Fremerey]

One mystery solved. I bought the card at 14 May 2013 at
hardwareversand.de and paid 49.60 Euros for it. Gosh.

[charlie]

From what I understand FAT32 has an individual file size limit of 4GB, exFAT does not have this restriction which is why exFAT would be the better choice if you are using your memory card/thumb drive/hard drive to transport large files from a Mac to a PC, for example.

[charlie]

Just to update, Sandisk replaced my card under the lifetime warranty even though it was physically damaged and even though they claim not to warranty physically damaged cards.

Thank you Sandisk/WD.