A Mac Studio with the M2 Max or Ultra ships with fast internal storage that cannot be upgraded later, so a Studio that warns it is almost full has to be managed rather than expanded, and the right approach is to find what is taking the space, move what you can to external storage and keep a margin free. Open the Apple menu, then System Settings, General, Storage, where macOS shows a colored bar and a list by category: Applications, Documents, Photos, System Data and others.
The checks in more detail
System Data is often large and confusing; it holds caches, local backups, logs and swap, and it grows when the Mac works with big files. Look at Documents and Applications first, since these are yours to move or delete. Large video projects, render caches, virtual machines, game libraries and Xcode support files are the usual giants on a Studio, and Apple's Optimize Storage tools help with some of them. Move what you do not need often to an external drive or to iCloud.
The Studio has fast Thunderbolt ports, so an external SSD is a good place for old projects, media libraries and backups, and it runs almost as fast as the internal drive for many tasks. Empty the Trash and the Downloads folder, remove local Time Machine snapshots if the system tells you they are large, and delete old iOS backups and installers. In the storage view, review large files with the Review Files option. Do not delete system folders.
Leave at least ten to fifteen percent free, because macOS uses free space for virtual memory and updates, and a Studio under that margin slows down and can fail to install updates. A tool such as the Disk Utility First Aid check helps if the numbers look wrong after you delete a lot, and a restart often frees the space that deleted files still hold. If you plan a heavy workload, think about buying the larger internal option at purchase next time, since it cannot be changed.
Differential
Likely causes of “Apple Mac Studio (M2 Max/M2 Ultra) storage is full or nearly full”, and how to tell them apart
- 1
Large media and project files
What separates it Documents or Movies dominates the bar
How to confirm Move old projects to an external SSD
- 2
Caches and System Data
What separates it System Data is large
How to confirm Clear caches, old snapshots and installers
- 3
Virtual machines and developer files
What separates it Applications and Developer take hundreds of gigabytes
How to confirm Archive or remove what you do not use
- 4
Old backups
What separates it iOS or local backups fill space
How to confirm Delete outdated backups
- 5
No free margin
What separates it The Mac slows and updates fail
How to confirm Keep ten to fifteen percent free
Before you touch a setting
Record this first — changing settings destroys the evidence
- The Storage settings breakdown
- The biggest categories
- Whether an external drive is available
- The free space remaining
Try in this order
0 of 6 completedOpen Storage settings
ReversibleSystem Settings, General, Storage.
Review large files
ReversibleUse the Review Files option.
Move projects to an external SSD
ReversibleThunderbolt makes it fast.
Delete old backups and installers
ReversibleThey are easy to forget.
Empty the Trash
ReversibleAnd restart.
Keep a margin free
ReversibleTen to fifteen percent.
Model-specific
What is true of this model and not of its siblings
- Fixed storage
- Internal storage cannot be added later.
- Thunderbolt
- External SSDs run fast over it.
Stop boundary
When this stops being a self-service repair
- !If space does not return after deleting and restarting, run First Aid and contact Apple
- !Plan external storage for the future
- !Back up first
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Can I upgrade the Mac Studio's internal storage?+
No, it is fixed at purchase.
What is System Data?+
Caches, snapshots, logs and swap files.
How much free space should I keep?+
Ten to fifteen percent.
Is an external SSD fast enough?+
A Thunderbolt SSD is fast for most tasks.