Probably easiest solution would be to move everything from the external drive to the laptop, erase the external and shift more data from the PC onto it, repeating the process until you have all your documents and application set-up files.
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.