The new option to use the FCbak extension for backup files has a small but important issue:
It leads to filenames with 2 dots, e.g. "Filename.20200315-215654.FCBak". Some security and anti-malware programs (only on Windows I guess) will therefore trigger such files as potentially harmful, especially since also the FCBak extension is not known to those programs.
To overcome this, could the dot please be replaced by e.g. a hyphen: "Filename-20200315-215654.FCBak"
OK I continue the analysis this week-end. To keep the number of archives we list the documents starting with the same name. I have to think a way to avoid confusions of the archives in this case. I often add a -1 -2 to a project name when I want to keep a version.
Your way would mix the files of the different projects saved in the same folder. That is why the name followed by the date is a better way sorting.
The backup policy is base on the date of the file so that whatever the logic of the naming of the backup they can be properly ordered to delete the eldest ones if too many.
But to identify the files I must be able to relate the backups to the project files and therefore to distinguish between the name of the file and the added part. The first . is the way, and it is working very fine.
If we just replace the . by - imagine 2 projects.
They backups would have the form
The first - cannot be the criteria if we do not want to confuse between the archives of the 2 projects.
That is why I would propose to add the date in the extension.