Mira stood up. Her phone lay on the table—its screen a dark mirror. She considered calling someone, telling them everything; she considered walking away and letting the envelope warm inside a drawer where it would be the best kind of secret: a saving thing not used. She thought of the child’s laugh that had opened the archive on the USB and felt the tug again, sharp and simple.
, it might be a video file named or coded in such a way that includes its format (mp4) and possibly a description of its intended use (portable). 042816550 mp4 portable
: This could be a product code, serial number, or another form of identifier. Without context, it's hard to say what it specifically refers to. Mira stood up