Back up with QNAP NAS to save your files
While the first line of defense against being affected by malicious software is being careful and practicing sensible usage habits (regularly updating your software, not opening untrustworthy emails, not visiting unknown websites, etc), you should always remember to back up your data.

QNAP NAS provides a simple solution for backing up/restoring files and data. Its Linux-based QTS operating system makes it more secure than Windows® systems that are more at risk from being attacked. Moreover, the native support for point-in-time snapshots that are operated separately from the file system makes QNAP NAS a reliable backup solution for reacting quickly for backing up and restoring important files and system data.

Snapshots: React quickly for backing up and restoring
Steps to restore your files with snapshots
QNAP Lab simulated a ransomware attack, and confirms that the following steps are suitable for recovering data with QNAP snapshots.
Use QNAP NetBak Replicator (or another backup tool) to regularly back up files to the NAS with user accounts that only have limited access rights (highly recommended), and then configure the snapshot function with the administrator's account.

If you notice ransomware activity or are presented with a ransom message, immediately disconnect your computer from the Internet, and remove the connection between the infected computer and NAS. If possible, disconnect the network cable from the NAS too to prevent the virus from spreading.

If you have a NAS with HDMI output you can connect a mouse, keyboard and HDMI monitor to the NAS, and access the NAS using HD Station. If your NAS lacks HDMI output, then when connecting to the NAS please ensure that your computer does not mount any infected shared folders until the snapshot is restored..

Click “Storage Manager”, and check the “Snapshot Manager” to see a list of snapshots.

Select a snapshot taken before the ransomware attack, delete all files in the infected folder, then restore those files with the snapshot. Your files should now be recovered and unencrypted.