Abstract: Method and systems for synchronizing files on a target storage medium with files on a source storage medium, where the target storage medium is divided into pages of a given size. If a file on the target storage medium has been modified compared to a corresponding file on the source storage medium, the page(s) involved are marked as free and all files that are stored in whole or in part on the page(s) receive a status of “to be copied to target storage medium”. For each page of the target storage medium that is marked as free, a selection is made from the files having such a status by repeatedly selecting the relatively largest file not yet selected that can be accommodated on the page, taking into account earlier files selected for the page, and for each page, copying the selection for that page to the target storage medium.