For the Production page for example you should see this button -

See Cloud Storage APIs and Cloud Storage Adapters.

See also this example by @Keren Skubach (it uses Azure and not AWS, but the principal is the same).

You might also find this HL7 benchmark post by @Mark Bolinsky useful, specifically the section titled "Disk Configuration", and the related "Table 2" there.

For convenience I'm pasting this table here (but read the original post for the full context, for example your scenario sounds more like the "T2 Workload" described there, rather than the "T4" one) -

Table 2: Disk Requirement per inbound HL7 T4 Message