Quick answer
Cloud services like OneDrive and Google Drive are useful for synchronization and restoring deleted files, but they are not a complete backup on their own. If a file is deleted from both the recycle bin and version history, or if the account is compromised, the copy disappears along with the original. For serious protection, you also need an independent copy, for example on an external drive or NAS device.
How to recognize the problem
- Files exist only in the cloud folder, nowhere on the local disk
- After deletion, the file is no longer in the cloud service's recycle bin
- Synchronization deleted the file from both the computer and the cloud
- The account was hacked and data was changed or locked
- No copy if the service has an outage or the account is terminated
Most common causes
Synchronization is not backup
OneDrive and Google Drive propagate changes in both directions. When you delete or overwrite a file, that change is applied everywhere, so there is no old copy except in limited history.
Short retention period for deleted files
The recycle bin and version history retain data for a limited time, depending on account type and settings. After that period, the file is permanently lost.
One account, one point of failure
If you lose access to your account due to a forgotten password, theft, or lockout, you can lose access to the account and everything in the cloud. Without another copy, there is no recovery.
Ransomware encrypts synchronized files too
Malicious software modifies files in the local folder, and synchronization immediately transfers those changes to the cloud.
Insufficient space and selective sync
Files marked as 'online-only' do not exist locally, so they are available only as long as the internet and account are working.
Step-by-step fix
- 1
Check what you currently have in the cloud
Open
OneDriveorGoogle Drivein a browser and review which folders you actually store. Pay attention to whether files are synchronized to the computer or only in the cloud. Note what is critical: documents, photos, databases, business files. - 2
Determine the retention period for deleted files
In OneDrive, open
Recycle binin the web interface and see how long deleted files are kept. In Google Drive, openTrashand check the same. That period is your recovery window, not permanent protection. - 3
Enable version history and verify it
In OneDrive, right-click a file and select
Version historyto check if older versions are kept. In Google Drive, right-click and selectFile information>Manage versions. If history is not available, that is a sign that the cloud alone will not help with overwritten files. - 4
Make an independent copy on an external drive
Connect an external drive and manually copy key folders, or use
File Historyin Windows (Control Panel > System and Security > File History). On macOS, useTime MachineviaSystem Settings > General > Time Machine. Keep the drive separate from the computer when copying is finished. - 5
Set up automatic copying of cloud folders
If you use the cloud folder as your main one, enable copying to an external drive or NAS. In Windows, this can be
File Historyif files are available locally, or on a NAS device a scheduled task that pulls the folder from the computer. The goal is to have a copy outside the cloud account. - 6
Enable two-factor authentication
In account settings, enable 2FA: in your Microsoft account via
Security > Advanced security options, in your Google account viaSecurity > 2-Step Verification. This prevents password theft from destroying the cloud copy as well. - 7
Test recovery on a single file
Before testing, verify that a copy exists and do not test on the only copy of a file. Choose a smaller file, delete it, and try to restore it from the recycle bin and from version history. Then restore it from the external drive as well. If any step fails, the backup is not reliable regardless of the files existing.
- 8
Implement the three-copy rule
Keep the original on the computer, a copy in the cloud, and a copy on an external drive or NAS. This covers deletion, disk failure, and account loss. The cloud then becomes one layer of protection, not the only one.
When the cloud is not enough and what to do next
The cloud is weakest as the only copy in cases of ransomware, account theft, and business data that must be kept for years. In those cases, introduce local backup to an external drive or NAS, with at least one copy off-site. For business accounts, check whether the administrator can restore data even after a user is deleted, because ordinary user accounts do not have that capability. If you have a database or files that change constantly, schedule copying at night and check the task log. Do not rely on the cloud service to restore everything: its recycle bin and version history have expiration dates.
How to prevent it
- Keep at least one copy outside the cloud account, on an external drive or NAS
- Enable two-factor authentication on the cloud account
- Regularly check that the backup task runs without errors
- Do not delete files from the cloud until you verify that a copy exists
When to call a professional
Contact IT support if you have business data in the cloud, if the account has been compromised, or if you cannot determine whether the backup task is working correctly.
IT infrastructure maintenance · Servers, networks, backup, security and helpdeskFAQ
Is OneDrive enough for backup?
OneDrive is good for synchronization and restoring deleted files within the period the service retains them. It is not enough as the only copy, because deletion or account compromise affects both the cloud and the computer.
How long does Google Drive keep deleted files?
Google Drive keeps deleted files in the trash for a limited time, and version history also has a limit. The exact period depends on the account type and settings, so check it in the trash and in settings.
Does the cloud protect against ransomware?
Not completely. If the folder is synchronized, modified files are transferred to the cloud. That is why you also need a copy made at a different time and not directly connected to the computer.