Abstract: Provided is a terminal device, which includes: a light-emitting layer and a cover plate, camera unit; the light-emitting layer includes a first light-emitting layer and a second light-emitting layer; when the first light-emitting layer is located at a first preset position, a first orthographic projection area of the first light-emitting layer in a first direction coincides with a second orthographic projection area of the camera unit, wherein the first direction a direction pointing from the light-emitting layer to the cover plate; and when the first light-emitting layer is located at a second preset position, a third orthographic projection area of the light-emitting layer does not coincide with at least part of the second orthographic projection area.

Abstract: A method of backing up large volumes of data that includes identifying a data file for remote backup; transmitting two or more chunks of the data file in parallel through a communications network to a server to be stored by the server; streaming, compressing, and encrypting prior to transmission each chunk without generating additional data copies for each of the streaming, compressing, and encrypting; detecting an interruption in the transmission a chunk(s); checking the availability and reliability of the communications network; and restarting transmission of the interrupted chunk after a randomized pause period.