Hp photosmart 435 camera says sd card is locked when not locked

SD cards top out at 2GB, and any of them may be used with the camera. Any larger cards are SDHC cards and will not work.

128mb. You probably have to order online.

Connected the camera with the USB cable at pc, open Explorer pc program to view like a "external device", select your files and copy/paste en each folder. Other way could be using some external device to your SD Card.
Additionally, its possible that find other details in this link for HP PHOTOSMART 435 MANUAL User Guide for HP 433 / 435 / 435v / 435xi

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Sorry, it just won't work. The HP 435 works with MMC and SD cards. Your new 4GB cards is actually an SDHC card. While it fits into the slot, it is electronically incompatible. You need to use cards 2GB and smaller.

SD cards have a slide switch along one edge. The position farthest from the contacts locks the card, protecting it from writes. The position nearest the contacts unlocks the card. If the switch is already in the proper position, slide it fully the other way and then back again.

The 435 will work with any SD or MMC card up to 2GB in size.

I looked on the manual ...and doesn't say anithing about cards..except that it has to be an SD...maybe there is something wrong with the camera ..or is not a secure digital ...and is a multimedia ...or the other way around...
try to see if its not locked...and reformat it on the computer ..if the camera don't have the feature to format it ......maybe its too small ...or too little ...or damaged...

You might be having trouble with your sd card in the camera because it is too big. Some camera's will only use a certain size card or up to a certain size card. Check your manual for restrictions on the size of SD cards that the camera can use. Also you can buy a sd card reader for about $20 at most stores that sell cameras. Put the card in the reader and then hook it to your computer. You can then transfer the pictures to the computer or to another sd card. Hope this helps.

The 435 will work with any SD or MMC card up to 2GB in size.

Simple really you need to buy a new memory card that is compatible with your HP photosmart. The card you have is probably designed for toshiba products specifically.