Don't Use RAR
RAR is a full-blown backup format* while 7zip is &quot;just&quot; an archive format. So comparisons are somewhat mood.<p>But even I as a RAR fan and license holder have to agree. For the average joe, sending email attachments, zip or 7z is enough.<p>* It can safe all three file timestamps (From nanoseconds precision (with NTFS), down to only 2 seconds precision (if you want to shave of a view bytes)), ACLs, ADS, Hard and Soft Links, Unix devices. It can add restore data to protect from bit rot. It deduplicates identical files. Variable length part-files. Skips already compressed files. etc. etc. (+ the GUI supports settings-profiles, which i really miss in 7zip.)