Windows already nudges you toward OneDrive for Desktop, Documents and Pictures, and that covers a lot of people well. It does not cover everyone: you might use a different cloud service, want a second copy somewhere OneDrive isn't, or just not want a live mirror for a folder where a bad save or an accidental delete would otherwise travel straight to the cloud with you. Here is how to back up a Windows folder to OneDrive, Google Drive, Dropbox, Box or Amazon S3, choosing exactly what goes and exactly when.
A synced folder is not a backup
This is worth getting straight before you set anything up, because it decides whether your backup survives the thing you are actually worried about.
A sync client, including OneDrive's own Windows integration, keeps two places identical in both directions. That is its job. Delete a file on your PC and the deletion travels with everything else, so the copy in the cloud disappears too. Overwrite a file with a broken version and the broken version is what is waiting for you when you need it.
A backup copies one way. It puts files somewhere else and leaves them there. When you delete something on the PC by mistake, the copy is still sitting in the destination, because nothing told it to go. Accidental deletion and a bad save are the two failures that actually happen to people, and a live mirror is transparent to both of them. We wrote the longer version of this argument in backup vs sync, and it is the whole reason to run a backup alongside a sync folder rather than instead of one.
Pick the folder, not the drive
You almost certainly do not need your whole C: drive in the cloud. The folders worth the upload are the ones you could not recreate:
- Documents, or wherever the actual work lives.
- Desktop, which on a lot of PCs is where files quietly pile up outside any synced folder.
- Project folders elsewhere on the drive, like a code directory or a folder of client exports.
- Anything already copied off a phone or a camera that hasn't been copied anywhere since.
Being selective is not a compromise, it is what makes the backup finish in a reasonable time and stay cheap enough that you keep doing it.
Setting it up in Sync
Sync by Miciniti runs on Windows as an app you open, not an agent you install and forget. The setup is four steps:
- Add your destination as a drive. Google Drive, Dropbox, OneDrive, Box or Amazon S3, signed in once and remembered.
- Create a Backup task and choose the Windows folder you want as the source.
- Point it at a destination folder on that drive, so everything lands somewhere predictable rather than at the root.
- Run it. Files copy up, your originals stay where they are, and you watch it finish.
The task is saved when you are done. Next time there are new files in that folder, it is one click rather than a setup exercise again, and only what changed has to travel. If you are not sure which operation fits a given job, the five sync modes explained walks through Backup, Backup Sync, Restore, Restore Sync and Full Sync, and which of them can delete anything.
Nothing runs on its own, on purpose
Being direct about this, because it is the thing people assume: Sync tasks run when you run them. There is no scheduler, no background agent, and nothing watching your folders while you work.
That trade is deliberate. Nothing leaves the PC without you starting it, nothing decides to upload a large folder while you're on a metered connection, and every backup is one you actually saw complete. The failure mode of the automatic kind is that it stops working silently, and you learn about it on the day you needed it.
Keep one copy that isn't OneDrive
If OneDrive is the only place your files live, in sync or otherwise, the backup has a shared fate with the thing it was protecting: one account problem away from being your only copy.
Running a Sync Backup task to a second service, Google Drive, Dropbox, Box or S3, costs almost nothing extra and gives you an independent copy on a different account. Add a USB or external drive as a third destination and you have the 3-2-1 backup rule in practice: your working copy, a cloud copy, and a copy on hardware you own.
One limitation to state plainly: Sync does not connect to a NAS or network drives. If your backup plan is built around a box on your home network, Sync covers the cloud and USB side of it and you will need something else for the NAS itself.
What it costs
Connecting any one drive in Sync is free and ad-supported, which is enough to try the setup above on a small folder. The free tier caps how much a single task can transfer, so backing up a large folder takes the paid upgrade. That upgrade also adds connecting several drives at once, USB and external drive support, and an ad-free experience, and it is available as a subscription or a one-time lifetime purchase.
Get Sync
Sync connects Google Drive, Dropbox, OneDrive, Box, Amazon S3, and USB and external drives from one app on Windows, Mac, iPhone and iPad and Android. If you want the wider picture of connecting several services at once, start with how to sync files to Google Drive, Dropbox and more.
