I have purchased an micro Sd pqi 4 GB from my local supermarket and when I insert this car in my SD slot in my computer with VISTA home primium . my 3 Vista computers can not read the card as if the card does not exist. While when I purchased a SCANDISK similar SD card my computers with Vista can immediately recognise the card , Please tell me the reason.

www.naviextras.com

It sounds like in your situation that you may have a bad card. If you cannot get your card to mount to your phone for storage, I would try to find access to a pc that has an SD card slot that you can try to format it that way. If the card still wont format, your looking at a defective card and will need to purchase a new one.

You can find Micro SD cards here for purchase.

http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&Depa=0&Order=BESTMATCH&Description=micro%20sd&IsRelated=1&cm_sp=KeywordRelated-_-micro_sd_card-_-micro%20sd

look at page "3/9" of this document "http://www.pqi.com.tw/upload/download/SD%20%284%29.pdf" and it will show on the lower right hand side of the picture a slot that says "write protect", move that tab to unlock the card.

BTW this is a good technical document for SD cards in general if you are interested in how they function.

you need to either purchase a micro sd card adapter or a usb memory card reader, they are both pretty cheap and available in most supermarkets/electrical outlets but cheaper still on ebay/amazon/play etc it all depends how fast you need it.

if theres a slot for an sd card on your computer you need a micro sd card adapter. if it doesnt have an sd card slot you need to buy a usb memory card reader (making sure it takes a micro sd card first)

 

both are widely available in supermarkets/electrical outlets or on ebay/amazon/play etc and are very inexpensive.

 

 

(micro sd adapter)

 

(memory card reader)

              

1. • 1 If your aim is to repair a corrupted SD card so that you can use it to store files then proceed to step #2.
     If your aim is to recover the files on the SD card without erasing them, proceed to step #5.
     
   • 2 Insert the SD card into a digital camera card slot and choose to format your card. If this doesn't work then move on to the next step...
     
   • 3 Place the SD card into your computers SD card slot.
     Right click on the SD card drive letter IF it appears and choose to "format."
     If this doesn't work, proceed to the next step...
     
   • 4:You will need to go to the website
     http://www.sdcard.org/consumers/formatter/eula/
     Here you will download, install, and run the program to format your SD card. This is the most advanced step of the three, but most likely to work 99% of the time.
     
   • 5
     If you want to recover files ON your SD without erasing them, then you need to download and run the software on this site.
     http://www.cgsecurity.org/wiki/TestDisk_Download
     This is the best free software available for this type of problem.
     

It will certainly take a 2GB microSD card.

This link on Sandisk forums tells how to check if you have a version 2 that will take a 4GB.

forums.sandisk.com/t5/Sansa-e200-series/Sansa-e250-compatible-with-4-GB-Micro-SD-Card

Where to buy one? My local supermarket has them, or you could check a camera store, or even office supplies. as well as the usual computer or electronics stores.

actualy 2 types of memory card named micro sd and mini sd are available so what u have brought is not for micro sd

your reader does not support the 8gb device, look for firmware upgrade for the reader

it might not be possible. sorry.