How does EBS work on AWS servers?

Question

Amazon Web Services

Raised ec2 instance, put node js (express) fullRESTApi on it, and started writing the front. The purpose of creating the server was as follows, the user could upload pictures to it and then receive them upon request. When creating, I chose EBS Volume for 30gb. After half a month, I went into my accounts and saw that a penny for using the additional EBS space began to fall. I decided to check, maybe I really uploaded a lot of pictures. After checking, it turned out that the memory is occupied by 800mb. So my question is, how does this work? Why did they start charging for extra space? I talked to support, they said that traffic is taken into account. What can be done ?

Answer 1

Open billing details where everything is clearly described. But in general, yes, outgoing traffic is paid, and in the free tier there is simply a certain amount of resources that are not taken into account in the final bill.
In general, the scheme is completely wild because in the AWS paradigm for this task it is worth using S3 (Simple Storage Service)

Answer 2

Look at "Volumes" (under "Elastic Block Store") - you may have created multiple volumes.