Operating system error

Unfortunately, we can not recommend anything specific because of the variety of errors you might encounter. We can suggest, however, you:

Backup fails

If the backup fails or if all backup tests fail, it’s possible the Adobe Commerce file system owner doesn’t have sufficient privileges and ownership of the Adobe Commerce file system. For example, another user might own the files or the files might be read-only.

Pay particular attention to file system permissions and ownership of the <magento_root>/var directory and subdirectories. For more information, see Set file system permissions and ownership.

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