Hi I have a Webmaster forum. It is medium size forum. But I don't have any experience about the space usage. I have removed the attachment facility. Can any body suggest about the server space need according to threads. I will provide the link if any body ask to see it. Thanks for your precious suggestions.
you may need more ram for this 1-2GB so you should be able to get a vps with 30-50GB with this much ram usually
I think that you need to compare rates, features, compatibility, performance and reliability and choose the best option. good luck!
Most of your space will be used by your forums database, but 5-10 GB should be sufficient unless it is a really large forum.
I think that 10-20Gb is totally enough for start but choose the host with the ability of upgrading plan