5 Sync Modes Explained: Which One Should You Use?
If you have ever opened a sync app and hesitated over which button to press, this is for you. Most tools hide everything behind one vague "sync" and hope for the best. Sync by Miciniti does the opposite: it gives you five explicit sync modes — five named operations — and asks you to pick the right one for each job. That sounds like more work, but it takes about two minutes to learn and it is the difference between a safety copy that protects you and a mirror that deletes your files along with your mistakes. Here is what each mode does and exactly when to reach for it.
The five modes at a glance
Every task you create in Sync pairs your files with one drive and one of these five operations:
| Mode | Direction | Deletes at the destination? | Reach for it when |
|---|---|---|---|
| Backup | Device → drive | Never | You want a full, safe copy of a folder |
| Backup Sync | Device → drive | Never | You are topping up an existing backup, fast |
| Restore | Drive → device | Never (writes to device) | You are pulling everything back |
| Restore Sync | Drive → device | Never (writes to device) | You only need the changed files back |
| Full Sync | Both ways | Yes, mirrored both ways | Two places must stay genuinely identical |
The one row to respect is the last one: Full Sync is the only mode that ever deletes. The other four only add and update. Keep that straight and you can't really go wrong.
Backup — your no-delete safety copy
Backup copies a folder one way, from your device to a drive, and only ever adds or updates files at the destination. Nothing on the drive is deleted, ever — even if you delete the original on your device.
This is the mode you want for anything irreplaceable: photos, documents, project files. Because it never removes anything from the drive, you can clear space on your phone later without touching the backed-up copies. That is precisely the behavior most people think "sync to the cloud" gives them, and usually don't get. (For why that gap loses real files, see Backup vs Sync: Which One Do You Actually Need?)
Use Backup for: the first copy of any folder you can't afford to lose, and for a second independent safety copy on another drive.
Backup Sync — fast top-ups after the first backup
A full Backup re-checks every file, which is thorough but slow once a folder gets large. Backup Sync is the incremental version: it copies one way to the drive like Backup, and never deletes anything, but it only moves the files that have changed since the last run. The first run of a big folder should be a Backup; after that, Backup Sync keeps it current in a fraction of the time.
Use Backup Sync for: re-running an existing backup after you have added or edited a few files — the everyday top-up.
Restore — pull everything back
Restore is Backup in reverse: a full one-way copy from a drive back to your device. This is the mode for a fresh start — a new phone, a reinstalled laptop, or recovering after you have lost the local files entirely. It rebuilds the folder on your device from what's safely stored on the drive.
Use Restore for: setting up a new device, or recovering a folder from scratch.
Restore Sync — bring back only what changed
Restore Sync is the incremental restore. When your device already has most of the files and you only want to pull down what's newer on the drive, Restore Sync brings back just the changes instead of re-downloading everything. Faster than a full Restore when you're topping up rather than rebuilding.
Use Restore Sync for: refreshing a folder you already mostly have — grabbing the latest edits without re-fetching the whole set.
Full Sync — keep two places identical (the one to respect)
Full Sync is the only true two-way mode. It compares your device and the drive and reconciles them so both ends up identical: new files copy in both directions, and — this is the important part — deletions are mirrored both ways. Delete a file on either side, and the next Full Sync removes it from the other.
That makes Full Sync exactly right for one job: a working folder that must genuinely match across two places, used deliberately, by someone who understands that a deletion will propagate. It is the wrong tool for a photo library or any "backup," because it will happily repeat a deletion you didn't mean to make.
Use Full Sync for: a shared working folder that has to stay matched — and keep a separate Backup task running alongside it, because a sync is not a safety copy.
How to choose in one question
You almost never have to think hard. Ask yourself: which way should the files move, and can I afford for a deletion to spread?
- Copying to safety, deletions must never spread → Backup (or Backup Sync to top up)
- Pulling files back onto a device → Restore (or Restore Sync to top up)
- Two places must stay truly identical, deletions and all → Full Sync
Notice how often the honest answer is Backup. Two-way Full Sync is powerful, but it's the right tool for a single, specific situation — not the default.
Putting the modes together: task recipes
Real setups combine a few tasks. A sane starting point:
- Backup each irreplaceable folder to a cloud drive — run it once in full, then use Backup Sync for quick top-ups afterward.
- A second Backup to an independent destination — a different cloud service, or a USB/external drive you keep offline. Two copies in two unrelated places is most of what the classic 3-2-1 backup rule buys you.
- Full Sync only where you can say out loud why both sides must match — and never for photos.
Tasks are set up once and run on demand, against any of your drives — Google Drive, Dropbox, Microsoft OneDrive, Box, Amazon S3, or local and USB/external storage. New to the drives-and-tasks model? Start with the step-by-step setup guide.
Get Sync
Sync is free to start: connect any one drive at no cost (ad-supported) and set up your first Backup task in minutes. Additional drives and features unlock with a Sync subscription or a one-time lifetime purchase. Available on iPhone and iPad, Android, Mac, and Windows.
Frequently asked questions
What are the sync modes in Sync?
Sync by Miciniti has five operations: Backup and Backup Sync copy one way to a drive, Restore and Restore Sync copy one way back to your device, and Full Sync reconciles two locations so both end up identical. Each task you create uses exactly one of them, so every job gets the behavior it needs.
What is the difference between Backup and Backup Sync?
Both copy one way from your device to a drive and never delete anything at the destination. Backup copies the full set of files every run; Backup Sync copies only the files that changed since last time, so it finishes much faster. Use Backup for the first run, Backup Sync for the quick top-ups after.
What is the difference between Full Sync and Backup Sync?
Backup Sync is one way — it only pushes changed files to the drive and never removes anything. Full Sync is two way — it makes both locations identical, which means a deletion on either side is mirrored to the other. Backup Sync protects a safety copy; Full Sync keeps a working folder matched.
When should I use Restore instead of Restore Sync?
Use Restore to pull a full copy back from a drive — setting up a new phone or laptop, or recovering after data loss. Use Restore Sync when the device already has most of the files and you only want to bring back what changed, which is faster.
Which sync mode is safest for photos?
Backup. Photos are irreplaceable, and you will eventually clear space on your device. Backup only ever adds and updates files on the drive, so deleting a local photo never deletes the backed-up copy. Avoid Full Sync for photo libraries — it would mirror that deletion.
Do these sync modes run automatically?
No. In Sync you set up a task once and run it when you want — the app does not perform scheduled or background syncing. That keeps you in control of exactly when files move, which is especially important for Full Sync, where a run propagates deletions.