# STEP Files huge when export

**URL:** <https://discourse.shapr3d.com/t/step-files-huge-when-export/28527>\
**Category:** Modeling Questions\
**Created:** [October 22, 2023, 1:30am UTC](https://discourse.shapr3d.com/t/step-files-huge-when-export/28527 "2023-10-22T01:30:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![vine\_ram](https://avatars.discourse-cdn.com/v4/letter/v/a88e57/32.png) [@vine\_ram](https://discourse.shapr3d.com/u/vine_ram)\
**Post date:** [October 22, 2023, 1:30am UTC](https://discourse.shapr3d.com/t/step-files-huge-when-export/28527/1 "2023-10-22T01:30:32Z")

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So, my issue is basically I was given a STEP file from a team member to finish up some cad, it was 116 mb from fusion 360. This was not a tiny thing, a huge project. So I just finished it up and now its 3 gigabytes? I added 5 parts onto it from a website and the STEP files combined together (of what i added) are less than 500mb. I’ve tried every single export option, and they are all huge. Some are even unloadable such as the Apple AR Format.

Another issue is that I cannot export to FBX and the Apple AR format combines certain parts together and some are not. Eg. the chassis was split into 2 parts, with some of it with the wheels and the other parts joined with the brain.

This is not the first time this is happening too.

![Screenshot 2023-10-21 at 7.18.59 PM](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/d/d/ddfc433b793fb6126ce44cbaddc50aef09a46fb4.png)