Japanese space agency (Jaxa) scientists want to detect a measurable acceleration in the spacecraft as photons - the particles of light - from the Sun fall on the roughly 200-sq-m, ultra-thin sheet.
You're looking at Kingston's DataTraveler Workspace, a storage device that incorporates bona fide SSD technology not usually found in thumbdrives -- like a bunch of ultra speedy flash memory and a SandForce controller that supports TRIM and S.M.