Archos 405 2GB isn't recognized by Windows XP computer anymore

What device wrote the files to the card? Was it a digital still camera, video camera etc.

Also, have you tried to repair the disk using CHKDSK (Windows PC) or Disk Utility (Mac)

It's not your card reader, the SDHC mini firmware is dead that's why your reader cannot detect it. Warranty, return it to SanDisk for a new one. Every hardware you plug or attach to a PC or Laptop has what is called a firmware, a mini program that communicates with your PC and Laptop that's how they syst

Sometimes it happens that your slot doesn't work you can use a another option like Olympus LS-10 digital recorder as a card reader for accessing the data. Insert the SD card in your LS-10 digital recorder then connect the recorder to the computer with a USB cord then it will show you two options for the onboard storage inherent and one for the SD-Card. Select first photoshop elements to read the card and then Windows Live photo Gallery to view and copy your photos.
If the Information helped you out then please give me some ratings. Thanks

There are recovery programs available. Google SDHC data recovery.

There are several possible causes for "memory card locked", "memory card error", or "no memory card". The most common cause is having the tiny slide switch on the side of the card in the wrong position. The second most common is trying to use a 4GB or higher SDHC card with an older camera made before SDHC format came out. There are also other common causes if the above didn't help, with troubleshooting steps for this problem listed here.

I beleive the memory that it can read is only limited by the software you are running such as windows XP sp1 and 2 can recognize upto 2gb SD cards but keep in mind that SD cards only go to 2gb anything bigger than that are SDHC and are the same size but designed differently so the reader must be able to read SDHC format. Note if your hardware is capable of reading SDHC cards and your software limits your ability to use anything bigger than 2gb you can still insert and use upto 2gb of space on an SDHC card that is, say 16gb so that is how you can tell if it is hardware or software that limits the use of an SDHC card.

hello,
maybe your device doesn't match putting up high memory card, remove that and place back your default micro sd card..
note:you should go back immediately to your previous sd card,before many conflicts occurs

may this was helpful to you,goodluck

From Microsoft support:
Some Secure Digital (SD) cards do not work correctly on Windows XP-based computers. Additionally, you may notice a yellow exclamation mark (!) next to the SD card in Device Manager.

This problem may occur even though you have applied other hotfixes that are required for high-capacity SD card support. For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base: 923293 The 923293 hotfix adds support for SD High Capacity memory cards in Windows XP 934428 Hotfix for Windows XP that adds support for SDHC cards that have a capacity of more than 4 GB

try using a high speed usb port

I'm having the same problem with a Transcend 4GB microSDHC card / microSD adapter. I have also found it probably has something to do with the card reader...either the card reader is an SD card reader trying to read an SDHC card OR the card reader is not able to read high-gigabyte SD cards (over 1 GB in some cases).