Jam when opening folder containing large number of pictures

There is a jam when the DO opens a folder containing a large number of picture files.(about 1000 png image ,size 5kb)
The file manager that comes with Windows does not exist when it is opened. Do needs to wait for about 5 seconds.
How to improve the speed of DO?

Could you post a screenshot of the folder and how it looks right after it finishes loading?

Is anything configured that would need to know details of all the files before it could display them? For example, if they are grouped by dimensions then it would need to extract the dimension information from each file before it knew which groups to put them in.

Are any network drives or cloud storage involved? Or any shortcuts in the same folder which point to one?

Any script add-ins installed?