File-Extensions.org forum

Hi, I found . bts file extension used by BitTorrent Sync app and service http://www.getsync.com . Used for all files unfinished downloads by synchronization process. Something similar like .!ut or .part, or .crdownload file extension. The temporary file gets size of original synced file and after su...

I found this file like 1.jpg.uid-zps together with my photos. It is used by Zoner Photo Studio

Hi, I found big files with a tiger file extension in the installation of PC game Tomb Raider. Obviously it will be a game data file or some kind of archive file.

The Time Machine backup file on my network drive (NAS) has recently become a .purgeable file. Due to network error during Time Machine backup I think. After that I cannot access my Mac backup anymore. I don't want to have to delete that file and backup my entire computer again. Is there a solution t...

Check this page: http://www.file-extensions.org/vos-file-extension
I think, it is not audio file, but some kind of database from the program.

What is rxm file extension? I think it is not Reflection file http://www.file-extensions.org/rxm-file-extension

What is the best software to find duplicate files?

I got some zdl file and do not know how to open it on my Macbook, can you help me?