How much free storage on 16″ M4 Pro 512GB (MX2U3)?

Available ≠ Free. The place to check how much Free space you have is in Disk Utility (in Applications > Utilities), by selecting the main container disk below the drive itself (you may need to select View menu > Show all devices to see it). For example, on my M4 MacBook Pro, the Storage settings pane and Get Info on the internal drive show 1.24 TB of Available space, whereas Disk Utility shows there is 1.15 TB of actual Free space, 90 GB less than ‘available’. 

Note that you can also see the Free space in the System Report (System Settings > General > About > System Report button, at the bottom > Storage). 

I have a 16” M4 Pro MBP (48 GB memory, 2 TB storage). macOS (including the native apps) takes 20-21 GB including Apple Intelligence, and the ‘extra’ volumes (preboot, recovery) take another ~10 GB, so you should have ~470 GB free.

You can’t add more internal storage later.

serg98 wrote:

How much free storage is available after setup on the MacBook Pro 16″ (2024, M4 Pro, 48GB RAM / 512GB SSD, model MX2U3)?

?

Select your MacIntosh HD in the Finder sidebar—Command i opens the info pane

Available minus purgeable = free storage

ref: Free up storage space on Mac - Apple Support

you can also see the big picture from the Terminal.app, copy and paste:

df -H

If you are just getting a ballpark idea of how much will be available after MacOS is loaded, you are doing fine.

Remember that a Mac with 470 GB free can not operate effectively right up to the 470 GB fullness mark.

MacOS requires over 9GB of free disk space to go from OFF to fully up and running.

When you get the boot drive over about 80 percent full, everything slows down enormously, and the Mac has to work harder and harder to find place to put files, and files are split into fragments to be tucked into available storage space.

The Mac has always been able to support one or more external drives, and almost all files can be moved to an external drive without penalty (except Applications, which need to stay in the /Applications folder on the boot drive.)

You’re welcome!