How to expand left sidebar width on the website?

Same here. We use DB for work and at third level (so company name, department, department main folder), DB starts cutting off folder names. Our names aren't even that long. By the 4th level, where we start putting images/docs by client name, job, or product, I can only see a few letters and it makes keeping stuff organized very difficult. Especially between multiple people in the company. I'm starting to find new folders with the same names as other folders, each in different places, because people couldn't;t find the folder they needed so they made a new one. 

You need to make it so we can extend the left folder sidebar, especially for business accounts.