I opened my Pendrive and details are :

SanDisk
X215050821
SDTNPNAHEM-004G
CPD463251

What is your idea for format it?

Maybe I have been too verbose and you have missed the questions in the tens of lines Ive posted. I will ask again in a different way:

1. What is the numbers on the controller?
2. What capacity is it? I guessed 4GB, is this right?
3. can you post pictures of both sides of flash PCB
4. Why do you want to spend time on trying to format it when it is quite probably faulty?
5. How did you come to the conclusion that no physical issues exist, when the time you said id, you had not opened the drive. Did you test the resistors/capacitors, look under microscope for damage?
6. is the drive

I've already stated that to fix flash drives if the firmware is fault, you need the Mass Production tools. There are two (2) chips.. a NAND chip and a controller chip. So far we have worked out the NAND is a Sandisk, though still don't know if refurbished, maybe not. But what is controller chip? You cant get the right tools without knowing that.

This is a Transcend JetFlash right? did you know they have a lifetime warranty? just get it replaced!

numbers on the controller? It have two Chips. One is SanDisk and another is Alcor.
It is 4GB.

Thanks, now we are (slowly) getting somewhere. Any reason you didn't post the actual numbers on the controller, as we cant really read it from the picture? or didn't answer anything past number 3.

I just cant see any point continuing. The drive is dead, replace it or warranty it.

You have already tried the manufacturers website, right??

http://au.transcend-info.com/Support/Software-3/

Thank you but which Version is OK for me :

JetFlash 200&220
JetFlash 620
JetFlash General
JetFlash V15

The numbers on Small chip are :

AU6998N
B61-GHL GR
H3F662-10F

If you remember I tried "AlcorMP_UFD" but its failed

I would try first the "Jetflash general product series" and if that doesn't work, V15.


what was the version of the alcor tool?

try: http://flashboot.ru/files/file/447/ and http://flashboot.ru/files/file/449/

But like I said, just get a new one!!!!

I did and I got errors. AlcorMP have a lot of options. How about Other tabs and options like "Mode" , "Bad Block" and ...?

I used "Alcor Recovery tool" and set my CTL and when click on "Low Level Format" I got "1024" and when click on "Scan Bad Block" I got "-486". What these numbers mean?

did you somehow miss the advice from the JetFlash online recovery tool? I will say it again for the last time, the drive is no good. get a new one

I know but as I said, some information exist on Pendrive

then "maybe" chip off recovery is your last resort
i don't know if there are people in your area (on the space) who are doing this kind of jobs

Right. Well If that's the case, and in my first post I said it didn't look like you needed data.. and you didn't correct me, and I see nowhere else that looks like you needed data. The operations you were trying were sure to destroy data. If I had known, I never would have suggested the MP tools.

I asked many times why you were trying to fix a measly 4gb drive and no answer was given.

As time doesn't seem an issue (it has taken 2 weeks to find out you needed data) why not just post to me, I will remove the chip and attempt recovery the usual way. The way you are going about it is almost certainly going to destroy data, the only saving grace is that the drive is not working.

Remove the chip and recover data on it need special device and board?

Yes, I guess, but not "special" just built for the job. a chip reader and software

Can you show me a chip reader model and software name ?

http://www.rusolut.com is one solution, there are 2 others, 3 if you count another company that will rip you off