how can i check micro sd card capacity

[arvinss]

Hi,

I am going to china to purchase micro sd card which uses in mobile but there is a problem....they used to cheat customer. i need to check each & every card & quantity is 5000. Reason of checking is as follows

1- Upgraded card - 512mb upgraded to 1 gb & 1gb upgraded to 2 gb but when we see the memory status in card then it will so 1 gb & 2 gb space but the space will be 512mb or 1 gb
2- may be some card of 5000 have no wafer...silicon ....

The normal testing method is to load a file of 1990mb file in it through mobile & laptop 

1 card will be cost around 4 usd dollar.....

so i want to check each & every card by my laptop but it will take too much time so i want to ask to all teachers that is there any device can be made such as micro sd card reader by which i can test 10 or 20 micro sd card at 1 time through laptop..


Request you to please Please help me really i will be obliged

[Hero999]

Don't buy from someone who cheats you, spend a little more to and buy from an honest supplier.

Checking 5000 cards will cost money and it's worth spending what you'd save on testing on higher quality goods that don't need testing.

[Silent Jack]

I'm inclined to agree with Hero.  However, if you are determined to go this route, you might try using inexpensive external card readers.  Write a batch file program to copy the test file to each card simultaneously.  This way you can load a number of cards, run the automated test on the lot, then swap out for the next set.  Short of building custom hardware, this is likely your best option.