Delete them to the recycle bin and leave them. Run the system for a couple of days and see if you get any problems. Generally anything with a .TMP extension can be deleted without worry. They are left over from program installs.
Surface Pro (2017) vs Surface Pro 4
20 groundbreaking 3D animation techniques
How to mine Bitcoin on Mac
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.