My sd card is saying blank and unsupported - HTC G1

You'll need a recovery program and your PC to retrieve them. I use RescuePRO Deluxe but there are many others out there and some are free. Get the software and a card reader, connect the reader, insert the card and run the recovery software. If your PC cannot access the card, try a "Quick Format" from the PC and then run the recovery software.

reformat it with fat32 file system.

Make sure you're using an SD card, 2GB or smaller. The 435 will not work with higher-capacity SDHC cards.

Format the card and try it again.

Had a similar problem with a Samsung phone. The phone developed a fault, fried the sim card and I lost all numbers, photos & messages.
You will need a new phone or repair if under guarantee, A new sim
card.If you wish to retain your old number just call customer services for the provider

THIS WILL MAKE YOU LOOSE ALL FILES!!!
(even password)
Take the memorycard out of the phone and,
put it in a computer.Use filesystem FAT-32
to reformat your memorycard.
Now the card will work again!
No password, No files will be left after a
complete reformat
This is your solution! Please vote!

Hi - You can download the manual by clicking the link underlined in blue below:

Photosmart M415

See page 166:



Also try formatting the card in the camera as cards that have been used in other cameras or formatted on a PC may not work correctly until formatted in the camera.


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Informatica

The first thing you will have to check the card. There is slot on the card that contains a switch. This will lock the card so that it is write-protected. This will cause the unsupported card error.

If the card looks fine, try a card reader just to confirm that the card has not been corrupted.

If the card is functional and you can read its contents from the PC or another SD-slot device, then the issue is your camera. The slot contains thin copper prongs that comes in contact the copper surface on the back of the SD card. If the prongs are bent or damage, then the camera cannot read your card.

I have fixed this before. So if you details instructions, contact me.