Thm is the data format of a small size image, usually icon-sized, which is very popular in web applications, especially galleries. It can also be created by different video and photo editing programs, even digital cameras as a sample image of a photo or complete video saved on the same camera. It is also commonly used by mobile phones to save theme files. You can use OpenOffice to open such files. If you find the thumbnails only and can’t open the main photo or video, then most probably you have the deleted them. In this case you will need to use a recover program.

Flv is a file extension for Flash Video Files. To use or edit such data, ideally you need either Adobe Flash Player or Adobe Flash Professional multimedia authoring software. Most recent versions of web browsers usually can play these files too. As a matter of fact, YouTube, Google Video, Reuters, Yahoo! Video and MySpace clips are usually in flv format, because such compressed data can be easily streamed over the internet.

Torrent files are used by BitTorrent, a protocol for distributing files online. It identifies content by URL and is designed to integrate seamlessly with the web. Its advantage over plain HTTP is that when multiple downloads of the same file happen concurrently, the downloaders upload to each other, making it possible for the file source to support very large numbers of downloaders with only a modest increase in its load. In simple terms, you can download and torrent file from anything who downloaded it already and has an active connection, not necessary from the main source.