Shared storage can sneak up on you.
It's a sunny day, the birds are chirping, and everyone in the cutting room is in a good mood. Until - BAM! Suddenly Avid is throwing error code, error code, error code. You can't save your bins, and everyone panics.
A large majority of the time, it's because you forgot one easy thing: Make sure the NEXIS (or other shared storage system) has enough space.
The problem with shared workspaces is that it's easy to fall into the trap of "someone else is looking out for that." Take it upon yourself to monitor your space usage, and you can prevent problems before they arise.
Find a way to fit checking the NEXIS (or other shared storage system) into your routine. I suggest doing it when you're waiting for dailies to copy over. When you no longer have dailies, move this task to first thing in the morning.
Check your media drive and the drive where the projects are stored. Projects get bigger than you think. Give them space to save their bins.
Talk to other assistant editors before "borrowing" their space. If you need extra space, and you think another episode could stand to lose some of their padding, be sure to discuss it first. Otherwise, you might leave them thinking they have space when they no longer do.
Remember, mistakes happen. So, if you suddenly have a full storage system, don't panic. Talk with your editor, post team, and tech team before offloading any media to an external drive. Sometimes, the tech team can give you more space, even temporarily, until the storage problems are sorted out.