diff --git a/types/drivelist/index.d.ts b/types/drivelist/index.d.ts
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+++ b/types/drivelist/index.d.ts
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+// Type definitions for drivelist 6.4.3
+// Project: https://github.com/resin-io-modules/drivelist
+// Definitions by: Xiao <https://github.com/WholeMilk>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 3.1.3
+
+export type BusType = "SATA" | "SCSI" | "ATA" | "IDE" | "PCI" | "UNKNOWN";
+
+export interface MountPoint {
+    path: string;
+    label?: string;
+}
+
+export interface Drive {
+    enumerator: string;
+    busType: BusType;
+    busVersion: string | null;
+    device: string;
+    devicePath: string | null;
+    raw: string;
+    description: string;
+    error: any | null;
+    size: number | null;
+    blockSize: number | null;
+    logicalBlockSize: number | null;
+    mountpoints: MountPoint[];
+    isReadOnly: boolean;
+    isSystem: boolean;
+    isVirtual: boolean | null;
+    isRemovable: boolean | null;
+    isCard: boolean | null;
+    isSCSI: boolean | null;
+    isUSB: boolean | null;
+    isUAS: boolean | null;
+}
+
+export function list(callback: (error: any, drives: Drive[]) => void): void;