diff --git a/hwmonDaemon.py b/hwmonDaemon.py
index 1a9790d..fa8ef14 100644
--- a/hwmonDaemon.py
+++ b/hwmonDaemon.py
@@ -777,38 +777,30 @@ class SystemHealthMonitor:
         return False
     
     def _parse_size(self, size_str: str) -> float:
-        """
-        Parse size string with units to float value
-        Examples: '44.9G', '1.9G', '192.2M', '5.3T'
-        """
-        if not size_str or not isinstance(size_str, str):
+        """Parse size string with units to float value"""
+        if not size_str:
             return 0.0
+        
+        # Handle M/G/T sizes with potential decimal points
+        match = re.match(r'([\d.]+)([KMGT])', size_str.strip())
+        if match:
+            value = float(match.group(1))
+            unit = match.group(2)
+            multipliers = {
+                'K': 1024,
+                'M': 1024**2, 
+                'G': 1024**3,
+                'T': 1024**4
+            }
+            return value * multipliers[unit]
             
-        # Remove any spaces and normalize format
-        size_str = size_str.strip().upper()
-        
-        # Define unit multipliers
-        units = {
-            'B': 1,
-            'K': 1024,
-            'M': 1024**2, 
-            'G': 1024**3,
-            'T': 1024**4,
-            'P': 1024**5
-        }
-        
+        # Try parsing as plain number
         try:
-            # Extract numeric value and unit
-            match = re.match(r'^([\d.]+)([BKMGTP])$', size_str)
-            if match:
-                value = float(match.group(1))
-                unit = match.group(2)
-                return value * units[unit]
             return float(size_str)
-        except (ValueError, AttributeError):
-            logger.debug(f"Could not parse size: {size_str}")
+        except ValueError:
             return 0.0
 
+
     def _is_physical_disk(self, device_path):
         """
         Check if the device is a physical disk, excluding logical volumes and special devices.