Webforms - data handling and storage

Hello,

I would like to know what is the best recommended practice / best apps methodology for the following scenario :

A Custom web form with options to enter data, add attachments and submit. On submission , the workflow gets triggered, followed by approvals and finally data update into the relevant transaction.

My query :

- > For saving the form data and attachments , the options which I am aware are :

1 ) tables

2) case management, into the transaction using GOS.

3) DMS

4 ) Workflow container

5) Business document services

Any more to add to this list would be really good.

In such scenario , what are the best possible way to be used ?

Would be good to hear your thoughts on this.

Thanks alot

Saujanya