When I place a new sd card in it shows it a locked card. suggestions

SD and Mini SD memory cards has a small slide switch on the edge of the card, which write protects data on the memory card or add photos to the SD card. Slide the switch from the LOCK position to the UNLOCK position, which is furthest away from the contacts.

Most likely the SD card is not being pushed in far enough to lock into place. You really need to use your fingernail to push it in past flush until you hear a clicking sound, at which point the card will lock into place.

Here are full instructions for insertion and removal of the SD card: Insert the memory card with the metal contacts going into the slot first and facing up at you. In other words the SD card label should be upside down when you insert it this way. You need to push the card in past flush to have the spring mechanism lock the card into place. To get the card out of the slot, push the card in past flush and then the spring mechanism will release it. You will hear a click when the card locks into place or is released from the slot.

The IXUS 50 works with SD cards. Your 4GB card is actually an SDHC card. While it fits into the slot, it is electronically incompatible and will not work. You need to use SD cards 2GB and smaller.

Removing the write protection depends on the source of the problem.
Broadly speaking, it can be any of the following scenarios

1. There is a write-protection tab on the mini sd card HOLDER. Every time you insert this into your PC or card holder, this tab slides to the write protect position. Either keep resetting, inserting & reinserting until it doesn't slide or tape it down.
2. There is nothing wrong with the mini sd card. Simply locate the write protection key and push it.
3. The mini sd card has some error: Go for a low level formatting.
4. The card has virus: Remove the virus. The link for the steps is present in the related link at the bottom of the article.
   

There is an easy way to solve this problem: Simply put the yellow lock in the middle of its slider. No sticky tape required, as shown below. But if your still having the same problem i suggest you try the sticky tape.

problem is only that small moveable yellow lock switch is not making, just put sellotape over it maybe two layers needed to make switch.
== Answer == Even though what is written below may work, the problem is probably that on the card reader (if you have one) there is a small switch that has lock written on the side. If this is pushed down, the drive is write protected, push it in the opposite direction and it may fix your problem I had the same problem with several cards but eventually found a way around it. DON'T buy a new one!

Make sure the SD card lock is 'off' and then use thin, opaque sticky tape (ie non see-through; eg insulation tape) to cover the whole gap but keep clear of the metal contacts at the back.

Your card should work fine now... don't know why this has to be done, but it works! Additional info:
Reason #1,
the mechanical lock switch accidentally moves to the "locked" position during insertion due to the poor quality of the switch. Hence, by taping it, you are actually preventing the lock switch to travel towards the lock position. i.e. downwards.

Reason #2
If the above fails, it is likely your SD card reader/writer's fault. But don't discard it or buy a new one yet. Allow me to explain the mechanical design of the SD card lock mechanism. So that you may choose to repair it if you want to. You will need a small paper clip and screw-driver to open your card reader. (Don't proceed if your card reader is still under warranty, please return/exchange with manufacturer) There is a mechanical switch very much like a micro push button (I wish I could show you the picture/drawing). Anyway, depending on the position of the lock switch. You either push or release this micro push button inside the SD card reader.
Due to mechanical wear and tear, or some forceful insertion of the SD card, the micro push button is in its "open" circuit position, i.e. write-protected. In order to make the SD card reader writable, we will need to "close" the circuit. (Note: this is an irreversible process as I will be telling you how to remove the write-protection feature of your SD card reader. Once you do this, you would be unable to use the SD card lock switch to lock your data. So, just be careful not to accidentally delete your data)
To proceed, you need to remove the main circuit board from the SD card reader/writer enclosure. The location of the micro push button switch is the same location as the unlock position of the SD card when inserted in the SD card reader/writer. From the BACK of the exposed SD card reader, insert the unfolded paper clip (same way when you try to poke something like a device reset button) except, that it has to be long enough to allow the micro switch to touch together for contact. Then insert the SD card. Once the contact is "closed", your SD card reader/writer can write again. I understand that without a drawing, this may not be very helpful. Please provide suggestions or better explanation if you can. Thanks.

Or, just tape the lock switch to unlocked. This also works for SD cards in normal size. back up all the files u have on ur card then follow these steps

1. Go to Control Panel
2. Go to Administrative tools
3. Go to Computer management
4. From the tree menu on the left select Disk Management
5. Now on the right side you will have a list of all storage devices connected to your computer. Select the one that is your mini SD card. BE CAREFUL WHEN CHOOSING THIS BECAUSE YOU COULD FORMAT YOUR HARDDRIVE. Double check the name in My Computer
6. Right click on the SD card and select format. A new window will pop up showing format options. Select FAT32 from the file system drop down and check the quick format option and then click on OK
7. Enjoy your mini SD card without that annoying write protection

First I know you've said you've checked the card's slide switch, but just want to restate this first for others with the same problem who may not know of this switch.

Check to make sure that you didn't accidentally place the tiny locking slide switch on the side of your SD card in the "locked" downward position. The correct "unlocked" position should be slid up toward the direction of the connectors.

If you've tried this, and it's still showing locked, it's likely that the locking switch inside the camera's card slot is stuck. If you look inside the slot on the side of the slot where the SD card slide switch would be, you'll see a glint of gold color on the side. This is the camera's lock/unlock switch. The other glint's of gold that you may see at the far end of the slot are the reader's connectors (ignore those).

Somehow, the locking switch is making contact and has become stuck in the locked position. With a plastic toothpick, or other skinny NON-METALLIC item, tap against this switch to see if you can jar open the contact to its normal unlocked position. Also try blowing compressed air at it, as some gunk may have worked its way in there, jamming it closed. Occasionally, reinsert the SD card to see if the issue has been corrected.

If repeated tries fail, it may be time to consider opening the camera to force open this switch (not recommended unless you have some familiarity with electronics). In this case please see the following (xscrewdriver, hope you don't mind me referencing your blog):

http://www.myfixtips.com/blog/digital-camera/how-to-fix-a-%e2%80%98card-locked%e2%80%99-problem-125.htm

It sounds like the tiny locking switch on the SD card has accidently been set to "lock". Remove the card from the camera and slide the switch to the opposite position. That should do it.

a device called password resetter
is available in market
please use that for reset ur password
thanx

There is a little slide switch on the side of the memory card. Good luck!

Some SD cards have a slider that will lock and unlock the card just like those old 3.5" floppy disks had.

Here's a picture