Question

backing up to usbs and external drives

i have a really large library of music which is continually updated, as well as all my files for uni/college that are also changing pretty much every day. to back these up i periodically transfer files over to the usb/hardrive. however this really doesnt work, as i dont really know which files i have changed and which ones are new etc. is there a way to transfer files based on their last edit date/any other more efficient way to make sure I dont have doubles and make sure i actully transfer them all over?

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Answer
Well if you copy and Windows finds
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thanks man, yeah this is what i do at the moment, but the files i have updated such as my class summaries im a not quite sure if i have changed and whatnot, and some files have the same names but are different things, probably an error on my part,

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Re: backup

Different files with the same name can only exist in different folders. So if you copy files from each different folder to a different folder, that's no issue at all.

Changed and new files have an 'archive' attribute, and any good backup program clears that, so the next run it will only read the newly changed and newly created files. And, indeed Windows Explorer is not a good backup program.

For a GUI based backup program, have a look at synctoy or syncback.
For a command line backup program (so your setup is in a .bat file) have a look at xcopy or robocopy (standard Windows tools) or xxcopy (free utility).

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