This icon is a 3-D representation of an external hard drive. It's made of a rectangle with stylized markings on the front. The markings signify the indicator lights you'll often see on external hard drives.
This is a SSD icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,900 icons, all in the same style and quality.