Android Code Snippet Get Free USB mass storage space

AddPermission(android.permission.READ_EXTERNAL_STORAGE)
AddReceiverText(USBService,
<intent-filter>
    <action android:name="android.intent.action.MEDIA_MOUNTED" />
    <data android:scheme="file"/>
</intent-filter>)

Sub Service_Start (StartingIntent As Intent)
    If(StartingIntent.Action = "android.intent.action.MEDIA_MOUNTED") Then
        Log("Media mounted:")
 
        Dim jo As JavaObject = StartingIntent
        Dim StorageVolume As JavaObject = jo.RunMethod("getParcelableExtra", Array As Object("android.os.storage.extra.STORAGE_VOLUME"))
        Dim VolumePath As String = StorageVolume.RunMethod("getPath", Null)
        Log("Volume ID: " & StorageVolume.RunMethod("getUuid", Null))
        Log("Volume State: " & StorageVolume.RunMethod("getState", Null))
        Log("Volume Path: " & VolumePath)
 
        Dim context As JavaObject
        context.InitializeContext
 
        Log("Volume label: " & StorageVolume.RunMethodJO("getDescription", Array As Object(context)))
 
        Dim f As JavaObject
        f.InitializeNewInstance("java.io.File", Array As Object(VolumePath))
        Dim TotalSpace As Long = f.RunMethod("getTotalSpace", Null)
        Dim FreeSpace As Long = f.RunMethod("getFreeSpace", Null)
    
        Log("Total Space: " & FormatFileSize(TotalSpace))
        Log("Free Space: " & FormatFileSize(FreeSpace))
    End If
    Service.StopAutomaticForeground 'Call this when the background task completes (if there is one)
End Sub

public Sub FormatFileSize(Bytes As Float) As String
    Private Unit() As String = Array As String(" Byte", " KB", " MB", " GB", " TB", " PB", " EB", " ZB", " YB")
    If Bytes = 0 Then
        Return "0 Bytes"
    Else
        Private Po, Si As Double
        Private I As Int
        Bytes = Abs(Bytes)
        I = Floor(Logarithm(Bytes, 1024))
        Po = Power(1024, I)
        Si = Bytes / Po
        Return NumberFormat(Si, 1, 3) & Unit(I)
    End If
End Sub

Media mounted:
Volume ID: 5DC8-9420
Volume State: mounted
Volume Path: /storage/5DC8-9420
Volume label: (String) Transcend
Total Space: 3.639 GB
Free Space: 1.689 GB