Rules send files to a folder of your choice before the normal sorting by extension. They are checked from top to bottom; the first matching enabled rule wins.

Rules tab → Add rule, then fill in:

Field	Example
Name	Invoices
Conditions	one or more conditions (below) — all of them must match
Target folder	Invoices or Work/Reports
Enabled	on / off

Add condition adds another condition (up to 5); the × next to a condition removes it. Example: extension = pdf and older_than_days = 365 sends only PDFs that are older than a year.

Condition	Value example	Matches
extension	pdf, tar.gz	Files with that extension (multi-part extensions work). .pdf and *.pdf mean the same; one extension per rule
name_pattern	invoice_*.pdf, *.log	Wildcard match on the file name, case-insensitive
min_size_mb	100	Files of at least 100 MB
max_size_mb	10	Files of at most 10 MB
older_than_days	365	Not modified for at least a year
newer_than_days	7	Modified in the last week

Sizes and days must be zero or positive numbers.

The target is always a folder inside the scanned folder. Sub-folders like Work/Reports are allowed. Not allowed:

• absolute paths, drive letters, ..
• the characters < > : " | ? *
• reserved Windows names like CON, NUL, COM1
• names ending with a dot or a space

A rule whose target is not allowed (e.g. from a hand-edited rules.json), or points outside the scanned folder through a link, is ignored during the scan with a warning in the log.

• Click the dot in the first column to switch a rule on or off (or select it and press Space).
• Double-click a rule (or Edit) to change it.
• ↑ / ↓ change the order — remember, the first match wins.
• Delete removes a rule after a confirmation.
• Changing rules clears a preview that was made with the old rules — scan again.

Rules do not use sub-categories: a rule's target folder is used as it is.

Goal	Condition	Value	Target
Keep invoices together	name_pattern	*invoice*	Invoices
Big files somewhere separate	min_size_mb	500	Large files
Archive what is older than a year	older_than_days	365	Archive
Archive old PDFs only	extension + older_than_days	pdf + 365	Archive
Logs into one folder	extension	log	Logs

In rules.json — see Data and Settings. Further conditions are stored in more_conditions (only for rules that have them). Versions 3.4.1 – 3.4.5 ignore them, so a rule with several conditions would match more files there; 3.4.0 and older cannot read such a file at all. If the file cannot be read for a moment (e.g. locked by a sync client), scans stop with a message instead of sorting without your rules. The file is read as UTF-8 (a byte order mark, as Notepad or PowerShell may write it, is fine). A damaged file — not valid JSON, or saved in another encoding — is backed up to rules_corrupt_<time>.json; if even that is impossible, the Rules tab refuses to save so the file is never overwritten.