PSD same res but huge file size difference

Question

Hi everyone, I have this puzzling question I like to find an answer to.

I have 2 PSDs of the same size and dpi but their file size are hugely different (188kb vs 30mb). Why is this so?

The file description are as follow:

:: Image A (188kb) ::

2.6cm x 2.6cm, 300dpi, greyscale, 8bit, Transparent background. Only one layer, unflattern.
Image on the layer is a thin circle line with a "X" inside. No smart object or vector inside this PSD.

:: Image B (30mb) ::

2.6cm x 2.6cm, 300dpi, greyscale, 8bit, Transparent background. Only one layer, unflattern.

Image on the layer is a thin circle line with a "Y" inside. No smart object or vector inside this PSD.

To summarize both are circle logo on a transparent layer, unflattern. I have no idea why their file size are so different. Can someone explain?

Thank you

JJMack · Accepted Answer

Right click and save as the following http://www.mouseprints.net/old/dpr/DeleteAncestorsData.jsx you can read this thread to learn the reason Re: Different File Sizes SAME HUGE RESULTS

JJMack · Answer

How many layers do each have one how many smart object object layers with embedded objects the are copies of other files. Size and resolution is only a small factor. Content is the biggest factor. Even without smart object images compress varies bat image content. Not by Numbers of Pixels in a image. There is also metadata, 30MB would seem very big if you have only one image. However the image may have megabytes of old history metadata.

https://forums.adobe.com/search.jspa?q=remove+ancestor+metadata&place=%2Fplaces%2F1413024

If you dupe the large PSD as many times as it has layers and delete different layers in each save them you may fine one layer is causing the bulk of the file size. If all save 30 MB I would suspect ancestor metadata.

Sign up

To post, reply, or follow discussions, please sign in with your Adobe ID.

Sign in to Adobe Community

To post, reply, or follow discussions, please sign in with your Adobe ID.

Scanning file for viruses.

This file cannot be downloaded