You’re not wrong in that your line of code will produce the right output.
In the same way var gloveBoxContents = myStorage["car"]["inside"]["glove box"]; would work to give you the right solution but not pass their tests, they are looking for a specific solution with a mixture of dot and bracket notation where you don’t have to use bracket notation unless you have spaces in the object’s key.
Like @v-lai said above, to pass this challenge, you need to use dot notation where you can and only use bracket notation for object properties with spaces. Your latest solution of:
var gloveBoxContents = myStorage.['car']['inside']['glove box'];
uses bracket notation for all properties.
HINT: Only one of the above properties needs bracket notation.