I can't find the memory card slot on th 3785 camera. where is it.

Card is too big. Specs in the manual say

SD memory card (optional) (up to 512MB capacity)

https://www.manualslib.com/manual/336674/Vivitar-Vivicam-3785.html?page=54#manual

..

Go to the camera's menu then the format the memory card function.

make sure the lock on the side of the memory card is in the unlock position. sometimes they will lock when inserted into camera. good luck.

You can format the SD card in your ViviCam 3785.

This utility formats the internal memory (or memory card) and erases all stored images and data. Make sure your SD card is in the unlocked position.
1. Press the button to turn on your ViviCam 3785.
2. Press the MODE button twice to enter Playback mode. Then press
the button to enter the Playback menu.
3. Select [Delete] by using the up/down arrow buttons, and press the OK button.
4. Select [Format ] by using the up/down arrow buttons, and press the OK button.
5. If you want to format your SD memory card or the internal memory choose
[OK] by pressing up/down arrow buttons, then press the OK button to confirm.

To cancel the action, select [Cancel] instead.

[No Image] pops up after the SD memory card or internal memory
has been formatted.

If you need a manual for your camera you can download a free PDF at
http://www.retrevo.com/support/Vivitar-3785-Digital-Cameras-manual/id/200ag818/t/2/
Please rate this solution. Thanks.

Consider NOT connecting your camera to your computer.The best way to download pictures from your camera to your computer involves removing the memory card from the camera and plugging it into a card reader (either built-in to the computer or connected via USB or FireWire). This is likely to be faster than connecting the camera to the computer, and won't run down your camera's batteries.Once the card is plugged in, it will appear to your computer as a removable drive. You can use the operating system's drag&drop facility to copy pictures from the card to the computer's hard drive, the same way you copy any other files. Or you can use any photo cataloging program such as Picasa.

We had the same problem. Our solution is that the camera is not able to regonize a chip larger than 512 MB. When we took pictures that we had on the smaller card that we had downloaded to our computer, put in the larger card in the computer and dragged the picture into the bigger card. It still would not display on the camera, but it will show on the computer and it works in a digital picture frame. I hope this made since, if you have any other questions, please email us at [email protected]

Hi Sir

# Insert your memory card into your computer's reader if you have one. If not, you can purchase a multi-format USB Memory Card reader from Amazon.com or Buy.com
# 2 Open up 'My Computer'. You should see it under the list of available drives.
# 3 Check its contents first to make sure that you have the right drive.
# 4 In 'My Computer', right-click on the drive and choose 'Format'.
# 5 Leave all the options as they are and click on 'Start'. This is a non-reversible process so make sure this is what you truly wanted to do in the first place.
# 6 Once the process is completed, take the memory card out and insert it into your Digital Camera or any other device. Try to browse to it to make sure it works fine now.

most likely the memory you are using is either corrupted or not damaged, try using a diferent one similar to the SD card you are using...
cheers

Might be that the card is too large/small for camera to recognize, or it is a newer type of memory. Look up the specs for camera and compare to stats of memory card.

If the camera works when one of the cards is used then the camera works. It just doesn't work with the other card - Due to a compatibility problem or a busted card. Are the cards both from the same manufacturer?