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Swann fits a HD camera and storage inside a pen for covert surveillance – New Tech Gadgets & Electronic Devices | Geek.com
Both cameras and flash memory continue to get smaller, and therefore can be fitted inside more space-restricted devices and objects. Typically the benefits are seen in the latest smartphones and tablets, which carry every greater amounts of flash memory and higher quality camera parts. But security company Swann has decided there’s another gadget that would benefit from being able to capture and store photos and video: a pen. There’s two versions of this pen available for aspiring spies and informants. The cheaper option is the PenCam 4GB, which offers up 4GB of on-board storage accessible via a built-in USB connection.
Just a note, you can use any size thumb drive I used 8gb it was on sale when I bought it. Also the more space you have on the drive the better... just incase the target computer has LOTS of files you will have the space to copy to.
How to make flash drive that copy's users files silently and automatically
The electromagnet. I haven't counted the number of turns or dimensions or anything. I passed the 30 gauge enamel coated magnet wire back and forth over the stainless steel shim about 7 times, or until "it looks powerful enough". Looking at how much is left on my roll, I used about 25 feet of wire on the shim, which is a T shape 3/16" wide at its narrowest, then expanding to 1/2" at the end, by 2 1/2" total length. The shim itself is really thin; just pick something that slides smoothly into your card reader. Also, after you cut it down to the T shape, it will have sharp edges.