Preserving Quality, when cropping in Lightroom

so sorry if addressed couldn't find exact answer:  why cropping in lightroom before export, decrease file size (and quality) drastically.

 

i complete al of initial edits clients gallery within lightroom requires cropping prior export. 

if don't crop before export still large file.  if crop before exporting 22mb file around 8 or 4mb. when go use image in album or canvas, printer alerts me "it's not recommended print due file size".

 

i've made sure ducks in row on export screen far setting @ largest...

 

any advice on how crop without losing image?

i've tested bridge, , photoshop quality decrease after cropping , both maintain size , quality.

 

help!

it's becoming real issue create finished products clients.

why cropping in lightroom before export, decrease file size (and quality) drastically.

cropping not decrease quality.

if have image of size, , crop it, of course smaller.

 

the megabytes meaningless, not indicate quality of image. stop looking @ megabytes. instead @ pixels in image, tell if have enough pixels given purpose.

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