Hi you can’t upload that much big files directly from file manager because there are limits but you can upload your file using filezilla.
Read this tutorial on how to do it
Yep, 162M is rather a big file to be uploading via the web
Make sure you upload it to location in your filing system that is not in public_html - presumably you don’t want your backups to be available to anonymous internet visitors.
You are receiving that error most likely because the DB import exceedes the max_updates_per_hour
The only way to fix this is either to manually import the database (if it is possible for this format) either to buy a paid plan and get rid of query limits: