It should be a temporary file of the application, automatically generated when the application is run, automatically deleted after restarting the computer, and automatically deleted after manual refresh (that is, after one visit). You can try to get these big files when you start the computer at 360.

The other is the virtual cache of Windows, which is also automatically generated. You can set its position and size, but manual setting is not recommended.

These files will not affect the storage space and work of the computer when it is actually used. There is no need to pay attention.