I have an 8 GB sd card that works fine in my computer, but when i put it in my dsi it says it is locked and when i check the tab to make sure its always unlocked. When i try another sd card though it works fine. any ideas?

It sounds like the tablet is having trouble reading your 128 GB SD cards.
There are a few things you can try to troubleshoot this issue:

1. Check the SD card for any visible damage. If the card is physically damaged, it may not work correctly.
2. Make sure that the SD card is properly inserted into the SD card slot on the tablet. It should fit snugly and be fully inserted.
3. Check that the SD card is compatible with your tablet. Some tablets can only support SD cards up to a certain capacity or with a certain type of file system.
4. If the SD card was working fine before and has suddenly stopped working, it's possible that the card has become corrupt. In this case, you may need to format the card to fix the issue.
5. If none of these steps help, you may need to try a different SD card to see if the issue is with the tablet or the SD card.

The Nintendo DSi and Nintendo DSi XL are compatible with most SD Cards with the following specifications:

Memory Capacity: Up to 32 GB (Gigabytes)
Type: The Nintendo DSi and Nintendo DSi XL support standard SD cards as well as high-capacity SD cards (SDHC) up to 32 GB in size. This includes miniSD and microSD when used with their respective adapters
Speed: SD Cards with a slow speed may experience slow transfer time when loading files, or may not work at all. Slow transfer times can also occur with SD Cards that have a great number of files on them.

you want to download isobuster then extract the file from isobuster and then it really works

make sure all the games and music etc are on still and copy them into a different file on your computer, then downlao the latest version of R4 data i think it is version 1.18 from the R4 website and put the downloaded files onto the sd card and take of the old version and then put your games back on
Hope this helped

Check the position of the "write protect" or "lock" tab on the SD card. Make sure it is (and remains) in the "unlocked" position when inserting into the camera. Some cards have flimsy lock tabs that do not require much effort to reposition. If you are not careful, the tab may be moved during the insertion & ejection process. You can ensure that the tab stays in place by putting a small amount of scotch tape - or a drop of super glue to hold it in place. Of course, if you go the glue method, it will be permanent.

Lastly, this camera supports SD cards up to 4 GB in capacity. That is, a 4 GB SD card - it does not mean a 4 GB SDHC card or any card greater than 4 GB. Make sure you've got the right card inserted.

I hope this helps!

1) This camera accepts SD cards up to 4 GB in capacity. Most 4 GB SD cards however, are "SDHC" types (check the label to determine which type you are using). If you are using a 4 GB "SDHC" card, it may be causing the problem, as it is not an "SD" card. Furthermore, any card greater than 4 GB is not compatible with the camera. Any SD card with a capacity less than 4 GB should work without issue.

2) Check the position of the lock or "protect" tab on the side of a compatible SD card to be sure it is in the unlock position. The camera will be unable to write to a locked or protected card.

http://www.moultriefeeders.com/Game-Spy-D40

I hope this helps!

memory card on a dsi goes in the bottom right, it's labeled SD CARD, and the whole plastic piece will hang lkoosely after you pry it.

You must have a card reader for your computer in order to add songs to an SD card. You will need an SD card in order to get Music onto your DSi. You can often purchase a USB card reader specifically for an SD card for cheap. Check your local electronics store. All you will need to do then is copy the .MP3 files over to the SD card. It works exactly like a Floppy Disc or a Flash Drive. The DSi should already have the software it needs to run .MP3 files.

To add music to your DSi, first you need a spare sd card, and a pc or laptop that can sync with the card. Remember that the DSi only plays AAC type songs, so convert the songs you want to copy-paste on the card. This can be done easily on Itunes on which I use by right-clicking on the song and it will show you there ' convernt to AAC'. After saving the songs , take out the card from the pc or laptop and you can now insert the card in your DSi and play music and enjoy.

I have a Canon A650 that was displaying a "card locked!" message. First, take out the card and check small the lock tab on the side of the card itself. Then, try a different SD card in the same camera. I tried an old 256 MB card from an older camera. I still got the "card locked" message. When I put the 1 GB card I was struggling with in my old Nikon, it read fine. So at this point I knew it was my camera and not the card. What finally worked for me was very gently pressing down on the metal flap inside the card chamber that detects the lock with the tip of a straightened paperclip. Hope this helps.