Photoshop .PSB saving/converting ISSUE

[Gamewyzard]

I am trying to make a large format print to send to VISTA PRINT.

The file is 72.24 x 120.24 inches in size.

The Photoshop .psb file is 3.1 GB in size.

I am trying to convert this to a PDF or a file format that Vista Print can upload. This is a large graphic file.

Everything I have tried has failed.  It simply seems Adobe can't handle the file.  Any suggestions on how I might get this to work? Any help greatly appreciated, thanks in advance.

[Gamewyzard]

Forgot....

Mac iOS
Monterey 12.6.7
I am current with Adobe Illustrator and Photoshop CC
File has one flatend layer graphic.

[Marvelous_Flower1587]

They seem to support a variety of formats.
* The sizes will vary and not all are lossless.

Our design studio is used for most of our print products

• Adobe Acrobat Document (*.pdf) (recommended)
• Adobe Illustrator Artwork 8.01- (*.ai, *.ait) (recommended)
• Adobe Photoshop Image (*.psd) (recommended)
• Bitmap Image (*.bmp)
• GIF Image (*.gif)
• JPEG Image (*.jpg,*.jpeg)
• Microsoft PowerPoint 2010 (or earlier) Document (*.ppt, *.pptx)
• PNG Image (*.png)
• TIFF Image (*.tif, *.tiff)
• High-Efficiency Image Content (*.HEIC)

[Gamewyzard]

Well, I have been using Adobe since the 90's and one thing is consistent ... I thought it was garbage then and continue to think it is garbage now.

My last solution was to do a QUICK JPG and that worked.  Why? Who knows.

All I could muster from my $300 something a year was a jpg.  Lovely.  Thanks, Adobe.  You continue to disappoint.