diff --git a/src/types/obj.ts b/src/types/obj.ts
index c523530..2356cfc 100644
--- a/src/types/obj.ts
+++ b/src/types/obj.ts
@@ -56,6 +56,7 @@ export type ArchiveMeta = {
 export type MountDetails = {
   total_space?: number
   free_space?: number
+  used_space?: number
   driver_name: string
 }
 
diff --git a/src/utils/storage.ts b/src/utils/storage.ts
index 15d37da..d884374 100644
--- a/src/utils/storage.ts
+++ b/src/utils/storage.ts
@@ -1,12 +1,12 @@
 import { MountDetails } from "~/types"
 
 export const showDiskUsage = (details?: MountDetails) => {
-  return details?.total_space > 0
+  return details?.total_space && details?.total_space > 0
 }
 
 export const toReadableUsage = (details: MountDetails) => {
   let total = details.total_space!
-  let used = total - details.free_space!
+  let used = details.used_space!
   const units = ["B", "K", "M", "G", "T", "P", "E"]
   const k = 1024
   let unit_i = 0
@@ -19,10 +19,11 @@ export const toReadableUsage = (details: MountDetails) => {
 }
 
 export const usedPercentage = (details: MountDetails) => {
-  return (
-    ((details.total_space! - details.free_space!) / details.total_space!) *
-    100.0
-  )
+  if (!details.total_space || details.total_space <= 0) return 0.0
+  const total = details.total_space
+  const used =
+    !details.used_space || details.used_space <= 0 ? 0.0 : details.used_space
+  return used >= total ? 100.0 : (used / total) * 100.0
 }
 
 export const nearlyFull = (details: MountDetails) => {