1. A method for folder recommendation, comprising: receiving a user request for a file save operation, the file save operation comprising saving a subject file to a folder of a file system having a plurality of folders, the folders having respective folder names, and the subject file having subject file information comprising one or more of a subject file name, subject file contents, and subject file metadata, wherein the file save operation is to be carried out from a source having source information comprising one or more of a source subject, source content, sender, and distribution list; providing history data of one or more previous file save operations, the history data including details of the previous file save operations and respective historical folders of the file system on which the one or more previous file save operations were performed; making a negative first determination that no match-by-history exists between the respective historical folders and the subject file information; making a negative second determination that no match-by-name exists between the subject file and exactly one folder of the file system; and responsively to the negative first determination and the negative second determination identifying a similar folder of the file system as a recommended folder for the file save operation.