To make it easier to manage files in SharePoint, it's possible to sync a library directly to your PC to make changes locally, which will then be synchronised back to the cloud.
First, open the library you want to sync. This might be your team files, or a specific folder within SharePoint.
Near the top of the screen, there is a Sync button, highlighted below.
A window similar to this will open, asking if you want to open OneDrive.
This may differ depending on the web browser you're using, but it will say something similar.
Click Yes, and wait a moment.
You may have a window pop up showing you where to go to find your newly-synced library - click Next through this. In any case, you'll see a notification such as the one below.
You can now get to your synced library through Windows Explorer; they will appear on the left-hand sidebar under the C&K Careers Ltd heading.
