Copsy›DJI Osmo & Action backup

Back up DJI Osmo & Action footage on a Mac

Written by a working DIT · Copsy · Last verified June 2026

Short answer

Copsy is a free Mac app that offloads the microSD card from your DJI Osmo Pocket 3 or Osmo Action 4/5. Pop the card into a reader, open Copsy, and it auto-detects the card, copies your footage to an external drive and to Google Drive or Dropbox in parallel, verifies every file with ASC-MHL checksums, organizes it by date and source, and pings you on Telegram when it's done.

Free, no card limit, no signup. macOS 13+ only. There is no Windows version.

Download Copsy for Mac → · macOS 13+ · no account needed

Why dragging Osmo footage in Finder isn't enough

The Osmo Pocket 3 and Osmo Action are small, but the cards fill fast. 4K/120, 10-bit D-Log M, and long handheld takes add up quickly on a single microSD. The risky moment is always the same: you copy the card in Finder, see the files land, and reformat to keep shooting. But Finder doesn't tell you whether each clip arrived bit-for-bit. A flaky reader, a marginal card, or a bumped cable can drop or corrupt a file silently, and you won't know until you scrub it in your edit, and by then the card is wiped.

Copsy closes that gap. It copies the card, then verifies every file with ASC-MHL checksums so you have proof each clip copied correctly before you reformat. Same idea the big productions use, just free and aimed at the way Osmo and Action shooters actually work.

What Copsy does for DJI microSD media

Plug in an Osmo / Action card and Copsy will…

Detect it by content. Copsy recognizes the card as a camera source from its files, with no need to label it or pick a profile. The same detection covers Sony, ARRI, RED, Blackmagic, Canon, drones, and audio recorders, so a mixed-rig microSD still offloads correctly.
Copy to a drive and the cloud in parallel. One offload writes to your external drive and, if you want, to Google Drive or Dropbox at the same time.
Verify with ASC-MHL. Every copied file is checksum-verified so nothing is lost or corrupted before you wipe the card.
Organize by date and source. Footage lands in a tidy folder structure grouped by shoot date and where it came from, instead of a flat dump of DCIM clips.
Ping you on Telegram. A message tells you the card finished and verified, so you can step away and keep shooting.

Shooting a DJI drone instead of an Osmo? The offload is the same, but the file layout and tips differ. See the DJI drone footage backup guide.

How to offload an Osmo or Action card, step by step

Eject and read the card. Power down the Osmo Pocket 3 or Osmo Action, remove the microSD, and put it in a card reader connected to your Mac. (You can also connect the camera itself in card-reader mode if you prefer.)
Open Copsy. It detects the card by its content and recognizes it as a camera source to copy from, so it won't write over your card.
Pick destinations. Choose an external drive, and optionally add Google Drive or Dropbox so the cloud copy runs in parallel with the drive copy.
Start and walk away. Copsy copies, organizes the footage by date and source, and verifies every file with ASC-MHL checksums.
Get the Telegram ping, then reformat. Once Copsy confirms the copy verified, you know nothing was lost, so it's safe to reformat the card in-camera for the next session.

Want the folder layout explained? See how to organize footage by date.

A note on honesty

Copsy is macOS-only (macOS 13 or later), and there's no Windows build. It's a focused offload-and-verify tool: it doesn't do LTO/LTFS archiving, and it has no Premiere or Resolve panel integration. If your workflow needs those, a paid pro tool may fit better. For getting Osmo and Action microSD footage onto a drive and the cloud, verified and organized, for free, that's exactly what Copsy is for.

Frequently asked questions

How do I back up DJI Osmo / Action footage on a Mac?

Pull the microSD card out of your DJI Osmo Pocket 3 or Osmo Action and plug it into your Mac with a card reader, then open Copsy. Copsy detects the card by its content, copies the footage to an external drive (and optionally to Google Drive or Dropbox in parallel), verifies every file with ASC-MHL checksums, and organizes it by date and source. It's free, runs on macOS 13 or later, and needs no signup.

Does Copsy detect DJI microSD cards?

Yes. Copsy auto-detects cards by their content rather than relying on a card label, so a DJI Osmo Pocket 3 or Osmo Action microSD is recognized as a camera source and treated as something to copy from. Copsy detects footage from Sony, ARRI, RED, Blackmagic, Canon, drones, and audio recorders the same way, so mixed-rig microSD cards still get offloaded correctly.

Does Copsy verify the copy?

Yes. Copsy verifies every copied file with ASC-MHL checksums, the same verification standard used on film sets and for Netflix deliveries, so you know each clip from your Osmo or Action copied bit-for-bit with nothing lost or corrupted before you reformat the card.

Can I back up to a drive and the cloud at once?

Yes. Copsy can copy your DJI footage to an external drive and to Google Drive or Dropbox in parallel during the same offload, so your local backup and your cloud copy happen together in one pass.

Is Copsy free?

Yes. Copsy is free to download and use today, with no card limit and no account required. It runs on macOS 13 or later. There is no Windows version.

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Copsy — a free Mac camera-offload app. Verified copies to a drive and the cloud, nothing lost.

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