I am looking at user files in X-Ways in which the "Record Changed" date is newer by several months than the creation and last accessed dates. According to X-Ways help, this is the date that the file's or directory FILE record was last modified. Are there user actions that would have caused this such as moving the file to a USB drive?
More context would be helpful; such as what device you are examining, what file system is it formated as, and such.
At first blush, assuming NTFS on a computer it is the date/time when the MFT Record was changed. This could be any number of changes that will trigger this - from changing the file name, saving it, recycling it, or anything that would trigger a last access timestamp update. I wouldn't put too much into the record changed timestamp since it can be triggered by SO many things, unless you can correlate it with other events.
Copying / Moving the file from the computer to a USB drive would not trigger this.
If it is important to your case, create a supertimeline with SIFT or 4n6Time and see what else was going on at that time.
Terry