My 5130 micro sd card of 8 gb has been locked

Depending on your laptop, 8 GB SD cards may not work. That said, insert the SD card, open Computer, right click on the SD Card icon, format.

Most SD memory cards have a small slide switch on the edge off the card. This switch is used to write ptotect the data on the SD card - you can lock or unlock the SD card be sliding this switch.

i forger my 3310 classic phoe sd memory card password . give solution

The e250 uses microSD cards, not microSDHC cards. The maximum size of microSD cards is 2GB. Anything larger are microSDHC cards.

You do not have a password to unlock you memory card. The things you should do is to look at you and if you can see a small button you just only slide it to unlock. After that you can use your memory card now.

According to Samsung's page on this camera, the following memory can be used:

External Memory(Optional) : Micro SD (up to 4GB)
Micro SDHC (up to 8GB)

4 GB is acceptable, but I think you do not have the correct type of card. You should be using a Micro SD or "Micro Secure Digital" (up to 4GB capacity) or a Micro SDHC or "Micro Secure Digital High Capacity" (up to 8 GB capacity) card. This is very different from an SD or SDHC card. These Micro cards are very small (smaller than your thumbnail) and are often packaged with an SD adapter card. Regardless if sold with or with out the adapter, the package should say Micro SD or Micro SDHC on it somewhere.

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

there is the virus in the card. scan it and deldte the virus

I read somewhere that a 4 GB Micro SD card is the largest you can put in the SanDisk Sansa E260 expansion slot. It's maximum capacity is 8 GB, with internal + external memory put together. This is from what I've read. Hope this helps.

When the Prada 1 (KE850) was launched, it officially only supported up to 8 GB SD(HC) cards, but there are SD card manufacturers (i.e. Kingston) which claim that their 16 GB cards work in a KE850.

You could contact LG Customercare to confirm this or go with the 8 GB card to be sure ...