The ALB Is associated with private subnets within the VPC.

The ALB received a request from a client, but the client closed the connection.

The ALB security group is not configured to allow inbound traffic from the users.

The ALB target group does not contain healthy EC2 instances.

Change the default block size for the Storage Gateway from 64 KB to 128 KB 256 KB or 512 KB to improve I/O performance

Create a larger disk for the cached volume. In the AWS Management Console. edit the local disks then select the new disk as the cached volume

Ensure that the physical disks for the Storage Gateway are in a RAID 1 configuration to allow higher throughput

Take point in time snapshots of all the volumes in Storage Gateway flush the cache completely then restore the volumes from the clean snapshots

Copy an automated RDS snapshot to the security account using the copy-db-snapshot command with the AWS CLI.

Create an RDS MySQL Read Replica for the critical database in the security account, then enable automatic backups for the Read Replica.

Create an RDS snapshot with the AWS CLI create-db-snapshot command, share it with the security account, then create a copy of the shared snapshot in the security account.

Use AWS DMS to replicate data from the critical database to another RDS MySQL instance in the security account, then use an automated backup for the RDS instance.