File sizes in Photoshop for printing stickers 155cm x 95cm?

Question

Design

Briefly explain please.
You need to print a sticker for the display case. Found a company that claims 1440DPi when printing stickers.
I set the dimensions of the created file in Photoshop to 155cm x 95cm and 1440 pixels/inch.
The file turns out to be 26 gigs, Photoshop somehow moves its muzzle. It seems to me that I got excited. But I don't want to lose quality when printing.
How to be?

Answer 1

Street printing is 75-150dpi is simply not needed anymore. And what technological resolution the printer has does not play a role here.
If you really want to make a file with 300dpi, you can always reduce it.

Answer 2

300dpi is more than enough for quality printing.