I am trying to convert a large PSB file into a different one, but I'd like to keep the resolution. When I try to export it as JPEG, the resulation cannot get higher than 25% of the original image. I've also tried saving it as a .TIFF, but that cannot be done either, because there is a size limit of 4GB for .TIFF files. Is there any way to remove those limitations? Thank you for your help.
PS: I would like to convert the original into something smaller, for example into something similar in size to this 400MB file:
JPEG files cannot go over 2 Gig or 65535 pixels wide or tall.
JPEG cannot go over 30,000 pixels wide or tall in Photoshop (due to some code that's proven difficult to replace).
So my suggestion is to use Image > Image Size to down sample the file to make jpg, png, or tiff limits.
Keep a backup of the original PSB.