I'm trying to make an architecture for a data lake, I already generated my CSV, txt, and Avro files they are in an On-Premise machine and I want to upload them to Google Cloud Storage, but I see that I have to go through the public internet and I don't want to that.
What options do I have to make as safe as possible?
I was trying to make a Compute Engine environment to upload the files here through SFTP and then moved them to Cloud Storage, but that will make my cost to go up.
I think this the use case of Google VPC. The key benefit provided on the product description is:
For on-premises, you can share a connection between VPC and on-premises resources with all regions in a single VPC
If you look deeper into documentation you may find document Configuring Private Google Access for on-premises hosts. Some information maybe be found here as well. This might be a good option for you.