Most storage work is really detective work: a large file is hiding in plain sight inside an ordinary-looking folder. Finder is the tool for finding it. These workflows turn a generic folder into a ranked list, so the heaviest item is always at the top where you cannot miss it.
Turn on folder sizes
Finder hides folder sizes by default, which is exactly why heavy folders stay invisible. Open any Finder window, choose View > Show View Options, and tick Calculate all sizes. Switch to list view with Command+2 if you are not already there. The Size column now fills in for folders as well as files. Click the Size column header to sort largest first. Your biggest folder is now the first row on screen.
Search by kind, not by name
When you do not know the name of an item, search by type. Press Command+F in a Finder window to open the search field, then use the Kind and Size filters that appear. You can ask, for example, for every movie larger than 500 MB, or every image over 20 MB. Add the search scope control to choose this folder, this drive, or the whole Mac. Combined with a size filter, this single search finds the long videos and giant images that fill a drive.
Review old archives and images
Old exports, disk images of projects you finished years ago, and folders of raw photographs are the usual suspects. Sort your Documents folder by size, then work down the list, opening each large folder with Quick Look to confirm what is inside. Old archives are easy to judge: if the work is finished and the files live somewhere else, the archive is a candidate. If it is the only copy, it belongs in a backup first.
Look inside before you decide
Press the space bar on any selected file to open Quick Look, a preview that costs nothing and answers most questions at a glance. A video plays, an image fills the screen, a document shows its first pages. Quick Look turns a name into a decision. When you need more, Get Info (Command+I) shows the true size, the dates, and where the item lives.
The folder where saved web items collect
There is one folder almost every Mac shares: the place your browser saves images, documents and archives pulled from the web. It sits near the top of Finder's sidebar, and it fills itself without anyone deciding to fill it. Open it, sort by size, and set the view to date order. Most people find a long tail of saved documents and archives they have never opened. Clear the ones you no longer need, and remember that most of them can be brought back if required, though you should be sure before removing the only copy.
A quick habit that prevents clutter: in your browser settings, point the save location at a folder you actually review, such as Desktop, instead of letting items pile up out of sight. Arriving somewhere visible beats arriving nowhere.
A five-minute routine
- Sort Documents by sizeOpen your home folder in list view and sort the Size column largest first.
- Step down the listFor each heavy folder, open it and repeat the sort one level deeper.
- Preview the candidatesPress the space bar on anything unfamiliar before judging it.
- Check the saved-items folderSort it by size and by date, and clear what you recognise as finished with.
- Remove copies, not originalsOnly remove an item once a duplicate exists elsewhere.
- Recheck StorageReturn to System Settings and confirm the available figure moved.
Keep a second copy before you remove the first. Before deleting anything you cannot recreate, make sure a duplicate exists on an external drive, in iCloud or with a backup. Removing an item is easy; replacing it is often impossible.
Finder rewards patience more than cleverness. Two or three passes of sorting and previewing will surface nearly everything that is worth reviewing, and you will finish with a short, confident list rather than a risky guess.