Index: cloudsync/handlers/ui_cs_request_handler.py
===================================================================
diff -u -rd2799fd4159bbf89974027611ef0f854a5d94121 -r21530c20b92d62582924e30f7ece9f9bc56dc3ae
--- cloudsync/handlers/ui_cs_request_handler.py	(.../ui_cs_request_handler.py)	(revision d2799fd4159bbf89974027611ef0f854a5d94121)
+++ cloudsync/handlers/ui_cs_request_handler.py	(.../ui_cs_request_handler.py)	(revision 21530c20b92d62582924e30f7ece9f9bc56dc3ae)
@@ -235,18 +235,23 @@
             # CS LOG ROTATION
             elif InboundMessageIDs.mapped_str_value(message.ID) == InboundMessageIDs.UI2CS_REQ_LOG_ROTATION:
                 self.logger.info("UI2CS_REQ_LOG_ROTATION request received")
-                self.logger.debug("Used Percentage: {0}".format(message.parameters[0]))
-                try:
-                    num_of_files, del_size_mb = helpers_log_rotation(message.parameters[0])
-                    message_body = str(
-                        OutboundMessageIDs.CS2UI_REQ_LOG_ROTATION.value) + f',{num_of_files}' + f',{del_size_mb}'
-                    self.output_channel.enqueue_message(message_body)
-                except Exception as e:
-                    error = Error("{0},2,{1},{2}".format(OutboundMessageIDs.CS2UI_ERROR.value,
-                                                         ErrorIDs.CS_LOG_ROTATION_ERROR.value,
-                                                         e))
+                if len(message.parameters) != 1 and message.parameters[0] > 0:
+                    try:
+                        self.logger.debug("Used Percentage: {0}".format(message.parameters[0]))
+                        num_of_files, del_size_mb = helpers_log_rotation(message.parameters[0])
+                        message_body = str(
+                            OutboundMessageIDs.CS2UI_REQ_LOG_ROTATION.value) + f',{num_of_files}' + f',{del_size_mb}'
+                        self.output_channel.enqueue_message(message_body)
+                    except Exception as e:
+                        error = Error("{0},2,{1},{2}".format(OutboundMessageIDs.CS2UI_ERROR.value,
+                                                             ErrorIDs.CS_LOG_ROTATION_ERROR.value,
+                                                             e))
+                        self.error_handler.enqueue_error(error=error)
+                else:
+                    error = Error("{0},2,{1},invalid # of parameters for log rotation".format(
+                        OutboundMessageIDs.CS2UI_ERROR.value,
+                        ErrorIDs.CS_LOG_ROTATION_ERROR.value))
                     self.error_handler.enqueue_error(error=error)
-
             # ERROR MESSAGE RECEIVED FROM UI
             elif InboundMessageIDs.mapped_str_value(message.ID) == InboundMessageIDs.UI2CS_ERROR:
                 error_body = "{0},{1},{2}".format(InboundMessageIDs.UI2CS_ERROR.value, message.size,
Index: cloudsync/utils/helpers.py
===================================================================
diff -u -rd2799fd4159bbf89974027611ef0f854a5d94121 -r21530c20b92d62582924e30f7ece9f9bc56dc3ae
--- cloudsync/utils/helpers.py	(.../helpers.py)	(revision d2799fd4159bbf89974027611ef0f854a5d94121)
+++ cloudsync/utils/helpers.py	(.../helpers.py)	(revision 21530c20b92d62582924e30f7ece9f9bc56dc3ae)
@@ -502,6 +502,9 @@
     num_files_deleted = 0
     # Total sd stats
     sd_total_bytes, sd_used_bytes, sd_free_bytes = shutil.disk_usage(UI2CS_FILE_CHANNELS_PATH)
+
+    if sd_used_bytes == 0:
+        sd_used_bytes = 1
     # Cloudsync log stats
     cs_used_bytes = int(subprocess.check_output(['du', '-bsx', UI2CS_FILE_CHANNELS_PATH]).split()[0].decode('utf-8'))
     total_deleted_size = cs_used_bytes