Backup: See if you can restore the data
Synchronization is not always a backup. Select data, second save place and a simple restoration test.
In this guide
Backup is intended to help you after failure, accidental removal or loss of access. You need not only a second save, but also the ability to read it. Start with several files that would be most severe for you.
Find out what you want back
Prepare a short list: documents, photos, designs and application data that cannot be reproduced from your account. Check whether the application requires a separate export procedure. Copying its shortcut or installation folder may not keep the data.
Passwords and recovery codes require special protection. Do not put them in an ordinary public folder with photos. In case of password manager read Export rules.
Distribute
The copy only on the same disk will disappear along with it. The second medium or appropriate service of the copy limits this problem. However, a carrier permanently connected to the computer can be changed by harmful software.
If you use the cloud, check the versioning, storage period and restoration procedure. Synchronization can quickly transfer accidental removal to other devices. Do not assume that any synchronized service retains independent historical copies.
Protect copy and key
Secure your service account with a unique password and 2FA method available. For a media with private files consider encryption offered by the system or copy tool. Check where you can safely store the recovery key.
If the key is only available on a broken device, the encrypted copy can be useless. Save an insecret instruction on how to find the correct recovery method without adding the key to the open note.
Test restoring your backup
Select a non-secret test file. Restore it to a separate folder and check the contents without overwriting the original. Note the date of the test and the method of restoration. Repeat the check after changing the tool or storage space.
A successful test of one file does not confirm the recovery of the entire system, but reveals basic problems: no key, empty copy or incomprehensible restoration process.