There are several ways of doing this. Have a look at this useful information with video about restoring from a backup or restoring to a previous version.
I am assuming that they are still not in your recycle bin.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
How VR is being used to simulate space
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.