ASKS ME TO FORMAT - Transcend StoreJet 25 Mobile 500GB USB 20 25'' External wOne Touch Backup (Red) 500 GB Hard Drive

I had the same issue on 11 different cards.
(all were OLD)
I bought a new one and there was no problem.

if hard disk asks for formatting then format it.This usually comes when u have formatted your system.
If it is not the problem then explain your problem so that we can give u the best solution

The card may be bad - try to format another.

If that would be your case that the phone is always asking you to format the MMC, your MMC could have been damaged or getting into being corrupted, please try using another MMC, and reformat it, then re-boot the phone, see if that works.
If that works(your other MMC) it simply means that your MMC is corrupted or faulty, have it replaced (buy a new one)

virus in your pendrive.
so format your pendrive dos command

start than run than type cmd than enter

ok and command type is

format (your pendrive colon) enter

i sure your pendrive format.

i have nokia 3110 classic mobile. the memory card is nokia. i set password for my memcard. i had a software problem with my phone. so i gave for installing sw for my phn. after installing the software, when i opened my mem card it asked password. but i forgot the password. so i wnt to format it. but for formatting also it asks password. pl solve my problem

Navigate to the 'Format' section of the menu then try each option ('Yes' 'No') separately---checking the advisories between each trial.

Crat

i have nokia 3110 classic mobile. the memory card is nokia. i set password for my memcard. i had a software problem with my phone. so i gave for installing sw for my phn. after installing the software, when i opened my mem card it asked password. but i forgot the password. so i wnt to format it. but for formatting also it asks password. pl solve my problem

when windows boots from cd so you can install it red the instructions carefully one of the pages it comes up with is
(What do you want to do)
R for repair
another letter for fresh install
then it asks you where you want to install press the letter indicated
new page
asks do you want to format press F then when asked follow instructions from there D for deleting partition F for formatting etc.
when formatting choose ntfs quick format
Hope this helps

format ur phone by using code * + 3 + Call key + On/Off key till formatting appears