A: 4K â also known as UHD (more on this in the next answer!) â is a picture technology that quadruples the number of pixels found in a full HD picture. These pixels are usually arranged in a 3,840 x 2,160 configuration, compared with the 1920x1080 you get in a full HD TV.
Files with the .7z extension are very similar to Zip files. These files are compressed archive files, usually created by the 7-Zip file archive utility. 7Z files can make it easier to send files and folders over email and the Web.
2013-07-31. 1  grayghost2 - 2013-07-31. I have only used 7z for extracting files to date. 2  Shell - 2013-07-31. The default folder for the archive is either the one that contains the files to compress, or the one you dragged those files to (with the right mouse button pressed).