The attachement storage limit of Professional Plan?

The attachement storage limit of Professional Plan?

Dear support,

I am using SDP Professional Edition (Help Desk + Asset Management) Cloud editon, and I would like to know what is the file storage size limit for PO's PDF attachment or product image??
I cannot find any info on edition martrix
https://www.manageengine.com/products/service-desk/cloud/online-helpdesk-comparison.html

Thanks.