How to Sync Files on a Flash Drive
Friday, April 18th, 2008For several years I have been keeping my current files on an SD card synchronized with files on two different computers. Early on I tried to keep track of what I’d changed and copy the files using Windows Explorer. Wow — that got old, not to mention confusing, in a hurry.
I began to look for an application that would let me sync a folder without giving it a lot of thought. Initially I used something called Allway Sync, as it was presented as a free file sync via USB. Well, the free version only permitted you to do a few syncs each week. I did many syncs each week — sometimes several each day, so either I had to pay for the application or find something else.
That is when I found Unison, “a file-synchronization tool for 
Unix and Windows. It allows two replicas of a collection of files and directories to be stored on different hosts (or different disks on the same host), modified separately, and then brought up to date by propagating the changes in each replica to the other.” (from The Unison Page)
