diff --git a/app/src/main/java/com/yinuo/safetywatcher/xls/utils/PathUtils.kt b/app/src/main/java/com/yinuo/safetywatcher/xls/utils/PathUtils.kt
index 65d1218..cdc3dfe 100644
--- a/app/src/main/java/com/yinuo/safetywatcher/xls/utils/PathUtils.kt
+++ b/app/src/main/java/com/yinuo/safetywatcher/xls/utils/PathUtils.kt
@@ -41,4 +41,12 @@ object PathUtils {
     fun getNowTimeFormat(dateToStringLongPattern: String): String {
         return SimpleDateFormat(dateToStringLongPattern, Locale.ROOT).format(Date());
     }
+
+    fun getAvailableInternalMemorySize():Long{
+        val storageDirectory = getExternalStorageDirectory()
+        val statFs = StatFs(storageDirectory)
+        val blockSizeLong = statFs.blockSizeLong
+        val availableBlocksLong = statFs.availableBlocksLong
+        return blockSizeLong * availableBlocksLong
+    }
 }
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