How can I remove the 90.2GB of "Other" storage under "About This Mac"

[12aabdelaal]

My 128 GB Mac Air has around 7GB left of storage, with 90GB of it being used as "other". I have removed all un-needed documents, downloads, applications and put music files/photos/videos on a hard drive. What could this 90GB be and how could I remove it?

Cheers

 

[JTToft]

Download an application such as DaisyDisk to create an overview of where the largest files and folders are located.
You can then prioritise and determine what you can live without.

 

[snaky69]

The figure is based on spotlight's index and can become way off the mark(it's a known, and still unfixed bug since Mavericks). Check disk utility for actual space remaining. Reindex spotlight and it should reflect what's actually on your computer.