facinick on "[Plugin: WooCommerce] error when extracting downloaded zip from downloadable products"

UNEXPECTED END OF ARCHIVE.
when i upload a zip file to woocommerce downloadable products, about 65 MB iin size, and download it after completing ayment, the downlaoded zip always has this error. whereas the zip is perfectly fine. extracts perfect before uploading on pc but after downloading it gets corrupt. please help.

https://wordpress.org/plugins/woocommerce/

i noticed for small zips or rars the process works fine. only when i upload 65mb zip it gets corrupt. what do i do?