As an example, on the card there is 5 pics that I transfer to the pc, then I format the card with the camera after with Windows Explorer I copy them back on the card still in Explorer I can see the pics on the card. Put the card back in the cam turn the cam on and try to visualize the pics on the cam and here comes the message on the the lcd that there is no image and there is 5 pics less to be taken, don't know why I can't see them...

You might want to ask around on the Canon Forum on the A75 forum (if they have one), mine were visible after transferring. Is there a possibility that you have created a folder on the camera that you need to step up or down to? It seems to be recognizing the size of the files because it's accounting for available memory space....

Hi, I would like to thank you for your help, this morning I notice that the pics that I transferred from the pc to the card had a different name that the one on the card. Ex: on the card the use a file name starting with IMG_ and the number of the picture and on my Pc the first 3 letters were gone. I rename the file on the pc by adding the missing three letters. Transferred the file to the card and every thing was ok. I could see the pics that I added with the cam.

Many thanks again..

Hi Craig. I read your replies to mars and they helped me with a problem I was having - thankyou! I was wondering if you or anyone could tell me if some card readers are quicker than others for transferring photos from computer to camera. My cam is a minolta a1 which only has usb1. I want to buy a cardreader - probably a lacie 6 in 1 to download photos to computer quicker but will it transfer photos back to camera as quick or does that require a special card reader??? Thankyou. Nigel..

By the way if there are some cardreaders that are better than others generally speaking that would be good to know. Where I live (Australia) three brands that are readily available are Sandisk (most common), Lexar and Lacie (rarer). I've found it hard to find up to date comparison reviews.....

Haven't really followed the readers. I don't know if there are any big differences, you might also ask on the accessories forum. I've had no trouble with the SanDisk I have and wouldn't expect troubles with any current model from them or Lexar. Don't know anything of Lacie (good or bad). Speed is probably most dependent on the speed of the interface - USB 1.1 or USB 2.0, etc. so that would depend on what your computer could handle, I suppose card speed might make a difference but I essentially only use 1 card type - 128m Smartmedia.

If your computer can handle USB 2.0, I'd get a 2.0 reader. There are some Firewire readers that should be even faster (the ones I saw on a quick search were compact Flash readers)...