Yes you can.
as long as they connect and the digital doesnt ask you for a sd card
The easiest way is to put the pictures on a computer and then insert the flash drive and put on what pictures you want.
transferring data such as music or pictures from your computer to your flash drive
To move pictures from a digital camera memory card to a flash memory drive without a computer, you can use a compatible card reader that connects directly to the flash drive. Insert the memory card from your camera into the card reader, then connect the reader to the flash drive. Some cameras also support direct USB OTG connections, allowing you to transfer files directly if your camera and flash drive support this feature. Always ensure the devices are compatible and follow the manufacturer's instructions for transferring files.
You will need to save the pictures on a flash drive, CD, or DVD, in order to load them on an iMac.
To transfer information from a flash drive to another flash drive the information must be uploaded to a computer from flash drive A then uploaded from the computer to flash drive B.
You can.
You could say " I just put it on the flash drive."
Depends on the frame but normally they are drag and drop like a flash drive hook up to USB connection, select the drive on your computer, drag out of frame and voila
You cannot transfer messages onto a flash drive because they are saved onto your account and not your 360.
Most cameras, yes. Connect the camera but don't use the included software, open windows explorer and look for the camera in "My Computer". You should be able to open the camera as a "removable drive", and copy files to and from the camera the same as you would a USB drive.
Yes you can if the flash drive is big enough.
I'm not sure why you would be needing to be hiding your digital camera, but if you had pictures that you didn't want found, just save them to a flash drive and erase tham from your camera. Then if they find your camera, your pictures won't be on there.