Hi I wondered if anyone could help? I've purchased a 16Gb micro SD Sandisk card for a MP3 player. I purchased one with a SD adapter because I don't have a micro HC compliant reader. I put the card in the player and was able to copy files onto the card via Windows. But I got tired of copying my oggs so stopped after copying about 6Gig. But what ever I do now I can't add any more. Furthermore, I can't destroy it either. If I run fdisk and press 'o' for a new partition table the linux machine sits there for a minute or two and returns me to the prompt. Then when I list devices 'fdisk -l' it's vanished. I've been reading forums about Sandisk cards and my head is spinning. What logs or switches should I observe what is going on? I found ufiformat a low level format tool but it refuses to identify the SD as a floppy, obviously because it's not. So is there another tool I need? BTW: There's a HP USB storage format tool that doesn't touch it either on the Windows platform. This is why I thought I've have better luck on linux. I've tried mkfs.vfat again it returns me to the prompt after several minutes having not touched the file system on the card. I could touch a test file and rm that file. But If I attempt larger file transfers the device craps out with read write errors and the device has vanished. As Micro SD's don't have a locking switch how on earth do I get this thing formatted and start again? Something has had some effect as it's currupted something as the mp3 player just crashes when I attempt to use it with the card inserted. I'm waiting for a new card reader but I don't think that's going to make any difference because I've tried to get my phone to format it. My Victor Stream too. None of them can touch this card. Well I have destroyed partition tables with dd before now but wouldn't have a clue on whether this would help in this situation. Any help would really be appreciated. Yours frustrated. -- -- Gena four kinds of freedom, for the users of the software: * The freedom to run the program, for any purpose (freedom 0). * The freedom to study how the program works, and adapt it to your needs (freedom 1). Access to the source code is a precondition for this. * The freedom to redistribute copies so you can help your neighbor (freedom 2). * The freedom to improve the program, and release your improvements to the public, so that the whole community benefits (freedom 3). Access to the source code is a precondition for this. Richard Matthew Stallman