My storage space is full because of old files. Can I delete them?

I'm not sure what you mean? Deleted files do not use quota. 

Shared, however, do. Have you left them? www.dropbox.com/share

What about backups? www.dropbox.com/backups 

I have checked my shared and backups and those are empty. I had a Dropbox account many years ago and recently needed to start using Dropbox again. However, the others on my team who share the same folders, have plenty of space. I'm the only one who keeps getting the message running out of storage. I thought maybe Dropbox was still including old files I may not have deleted years ago.

scoob429 wrote:

However, the others on my team who share the same folders, have plenty of space

They very likely have upgraded accounts then. 

Shared folders use up the quota of everybody within the Team, so, if you are in a share you need enough quota to access that file - either via Upgrade or being part of a paid Business plan. 

So I would be the only one on a team of 4 that would have this problem? I do not understand how that is possible if we are sharing the exact same folders/files. Each should have the same if not maybe a little more of space showing.

Hey scoob429 thanks for posting here!

Can you send us a screenshot of your account's plan page, in order for us to have a visual? 

Keep me posted, and we'll take it from there!

scoob429 wrote:

So I would be the only one on a team of 4 that would have this problem?

Check https://www.dropbox.com/manage?_tk=account_menu on each persons account to see what their quota is. Referrals etc. can get people more space than others.