Organising files

What a drag will do

Updated 2026-07-31 · 3 min read

Finder decides move-or-copy from where you drag, and shows a tiny badge announcing it. Learn the rules once.

The default rules

• Same volume → move
• Different volume (external drive, network share) → copy
• Anywhere → iCloud Drive or out of it → move, with a warning going out

The cursor badge tells you: a green + means copy; nothing means move.

Overriding

Hold	Effect
⌥	Force copy (green +)
⌘	Force move, even across volumes
⌥⌘	Make an alias instead

⌘-drag to an external drive is the one worth memorising: move in one gesture, rather than copy-then-delete.

Without the mouse

Finder has cut/paste for files, disguised:

• ⌘C copies the selection
• ⌘V pastes a copy
• ⌘⌥V pastes as a *move* — the Mac equivalent of cut-paste

There is no ⌘X for files by design; the move happens at paste time, so nothing is ever in a "cut" limbo.

In the Terminal

mv file /Volumes/Drive/     # move, even across volumes
cp -R folder /Volumes/Drive/

mv across volumes is a copy-then-delete under the hood — interrupting it mid-way can leave partials at the destination, which is why for big cross-volume moves rsync then delete is the careful pattern.

Same-volume moves are free

On APFS, moving within a volume rewrites directory entries only — instant for any size. Reorganising a terabyte inside one drive costs nothing; pushing it to another drive costs a full copy. Structure your tidy-ups accordingly.

Common questions

How do I cut and paste files on a Mac?

⌘C to copy, then ⌘⌥V to paste-as-move. The Option turns paste into the move.

Why does dragging to an external drive copy instead of move?

Cross-volume drags default to copy. Hold ⌘ while dragging to force a move.