PC freezes whenever I open a certain folder

Jan 1, 2019
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The screen of my pc turns to the color of the windows theme whenever I open a certain folder. But all other softwares are still going like Spotify still goes, it's just that the screen just turn brown or blue whatever the windows theme is. I'm using a lenovo i5, 8gb RAM, nvidia geforce gt 730 graphics card, windows 10.
 


As matter of fact it does have a lot of 3D and 2D models saved in that folder and it's in Back Up (D).