Photoshop *casually* eats up 113GB of disk space when opening an empty project in A2 format

[oblique ruin]

As the title states somethng unexplainable happens whenever i open up an empty project on 420x594 mm with resolution 300 pixel/inch and CMYK colour mode.

Remedies i found online that did jack:

Deleting Temp files

Moving scratch disk to my 560gb disk (instead of my 237gb maindisk lol) photoshop just casually keeps using the C drive.

just very slight signs of annoyance bc everytime you gotta use photoshop it throws a tantrum and invents a new issue.

any help is deeply appreciated. (i also tried chatgpt to help me but it proved to be useless too)

[knotty ermine]

Hi, what is your output method?
If it is a commercial press, CYMK might be warranted, but you should work in RGB and proof preview if you know the exact profile the press would use.
If it is a desktop printer, use an RGB profile. Is it a 16bits/channel file? It would need more room…

[light pebble]

Are you sure that was "mm" and not "cm" or "in"? And are you sure that the resolution was 300 Pixel/Inches and not Pixel/Centimeters (this will create a huge file).
This happen with a lot a people, not realizing that you are using the wrong unit of measurement is quite common.
Can you go to Image - Image Size and take a print screen and post here?