diff --git a/README.md b/README.md
index 331e6c0..42f2ed8 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,7 @@ If you installed rsync via Homebrew, the binary lives in `/opt/homebrew/bin/` wh
 – Requires rsync and ssh on PATH (included on macOS by default).
 – Uses your existing ~/.ssh config and keys.
 – Full Disk Access may be required to sync protected directories.
+– Before the first real sync to a new remote path, run a dry-run (`rsync -avn …` or your rule with dry-run enabled) so deletes and path mismatches are visible without writing files.
 – No Dock icon; lives entirely in the menu bar.
 
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