In the world of web development, numbers like 1608821048 aren't random. They are often —the number of seconds that have elapsed since January 1, 1970.
A file named 1608821048.rar is almost certainly an automated backup or a mirrored download from late 2020. While the name is boring, the contents could be exactly the "lost media" or old project file you’ve been looking for—just make sure your antivirus is standing guard!
Most modern archivers allow you to "View Content" without fully extracting the file. If you see a bunch of .exe or .scr files inside a mystery RAR, proceed with extreme caution. The Verdict
What’s in a (file)name? - Geneva Graduate Institute Library Blog
Did you find this on a reputable developer's site or a shady redirect page?
Should you click it? What is it? And why do files end up with names that look like a cat walked across a numpad?