Duplicate files ...
I use the Norton Utility duplicate file utility 'Space Wizard', which does similar work. Norton does inform their users of the criteria used to select candidates for action. It considers a file a duplicate if it has the same name, size, and creation time. Interestingly enough, if just the size and creation time match, the file is also included, even if the name is different. The user is given the option of leaving as-is, deleting, or compressing and storing for later retrieval, if needed.
Typical candidates are files in 'TEMP' or 'TMP' folders, recycle bins, and installation 'left-overs'. Also, files which haven't been accessed for a period are flagged. The user gets a chance to accept or reject the program's recommendations.
Duplicates seem to come from installation programs which 'bulk-copy' files from your CD and then 'pick-and-choose' which files are really needed. The 'needed' files are then copied to their final location. Another cause seems to be software which require a 'supporting-cast' of files to run. Just to be sure, they bring their own copies onto your disk; hence you're blessed with many copies.
About deleting them -- I'd make sure you've a recent back-up first, then be cautious.
Hope this helps, PW. |
