Index: cloudsync/common/enums.py
===================================================================
diff -u -r34a18ebe349364c4e0462d876d4d191bf3df8939 -rb04cc09e78e03c04c2fe04bb4ef18dc14ab203de
--- cloudsync/common/enums.py	(.../enums.py)	(revision 34a18ebe349364c4e0462d876d4d191bf3df8939)
+++ cloudsync/common/enums.py	(.../enums.py)	(revision b04cc09e78e03c04c2fe04bb4ef18dc14ab203de)
@@ -75,6 +75,7 @@
     UI2CS_SEND_TREATMENT_REPORT = 1007
     UI2CS_REQ_DECOMMISSION = 1009
     UI2CS_UPLOAD_DEVICE_LOG = 1010  # DEVICE_LOG
+    UI2CS_REQ_LOG_ROTATION = 1011
 
     # INCOMING ERROR
     UI2CS_ERROR = 1999
@@ -93,6 +94,7 @@
     CS2UI_REQ_TX_CODE_DISPLAY = 2008
     CS2UI_REQ_DEVICE_DECOMMISSIONED = 2009
     CS2UI_DEVICE_LOG_UPLOADED = 2010
+    CS2UI_REQ_LOG_ROTATION = 2011
 
     # OUTGOING ERROR
     CS2UI_ERROR = 2999
@@ -131,3 +133,4 @@
     CS_SAVE_CONFIG_ERROR = 929
     CS_DEVICE_LOG_ERROR = 930
     CS_LOG_ERROR = 931
+    CS_LOG_ROTATION_ERROR = 932
Index: cloudsync/handlers/ui_cs_request_handler.py
===================================================================
diff -u -r34a18ebe349364c4e0462d876d4d191bf3df8939 -rb04cc09e78e03c04c2fe04bb4ef18dc14ab203de
--- cloudsync/handlers/ui_cs_request_handler.py	(.../ui_cs_request_handler.py)	(revision 34a18ebe349364c4e0462d876d4d191bf3df8939)
+++ cloudsync/handlers/ui_cs_request_handler.py	(.../ui_cs_request_handler.py)	(revision b04cc09e78e03c04c2fe04bb4ef18dc14ab203de)
@@ -232,6 +232,26 @@
                                                          e))
                     self.error_handler.enqueue_error(error=error)
 
+            # CS LOG ROTATION
+            elif InboundMessageIDs.mapped_str_value(message.ID) == InboundMessageIDs.UI2CS_REQ_LOG_ROTATION:
+                self.logger.info("UI2CS_REQ_LOG_ROTATION request received")
+                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/globals.py
===================================================================
diff -u -r34a18ebe349364c4e0462d876d4d191bf3df8939 -rb04cc09e78e03c04c2fe04bb4ef18dc14ab203de
--- cloudsync/utils/globals.py	(.../globals.py)	(revision 34a18ebe349364c4e0462d876d4d191bf3df8939)
+++ cloudsync/utils/globals.py	(.../globals.py)	(revision b04cc09e78e03c04c2fe04bb4ef18dc14ab203de)
@@ -67,6 +67,7 @@
 
 # UI2CS VALUES
 UI2CS_FILE_CHANNELS_PATH = "/media/sd-card/cloudsync"
+UI2CS_FILE_LOG_PATH = "/media/sd-card/cloudsync/log"
 # PATH for running off device
 UI2CS_FILE_CHANNELS_PATH = "data/busses"
 
Index: cloudsync/utils/helpers.py
===================================================================
diff -u -r34a18ebe349364c4e0462d876d4d191bf3df8939 -rb04cc09e78e03c04c2fe04bb4ef18dc14ab203de
--- cloudsync/utils/helpers.py	(.../helpers.py)	(revision 34a18ebe349364c4e0462d876d4d191bf3df8939)
+++ cloudsync/utils/helpers.py	(.../helpers.py)	(revision b04cc09e78e03c04c2fe04bb4ef18dc14ab203de)
@@ -8,6 +8,7 @@
 import re
 import base64
 import uuid
+import subprocess
 
 from datetime import *
 from time import time, sleep
@@ -742,3 +743,49 @@
         duration_in_seconds = int(duration/1000)
         return duration_in_seconds, start_timestamp, end_timestamp
     return None
+
+
+def helpers_log_rotation(rotation_pct):
+    cs_log_pct = rotation_pct / 100
+    num_files_deleted = 0
+    total_deleted_size = 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
+    used_bytes_proc_call = subprocess.check_output(['du', '-bsx', UI2CS_FILE_CHANNELS_PATH]).split()
+    if len(used_bytes_proc_call) > 0:
+        cs_used_bytes = int(used_bytes_proc_call[0].decode('utf-8'))
+
+        total_deleted_size = cs_used_bytes
+        # Retrieve file list
+        f = []
+        for subdir, dir, files in os.walk(UI2CS_FILE_LOG_PATH):
+            for file in files:
+                f.append(os.path.join(UI2CS_FILE_LOG_PATH, file))
+
+        # Sorted with oldest modified first.
+        f.sort(key=lambda x: os.path.getmtime(x))
+
+        if len(f) > 1:
+            while (cs_used_bytes / sd_used_bytes) <= cs_log_pct:
+                file_to_remove = f[0]
+                os.remove(file_to_remove)
+                num_files_deleted += 1
+                f.pop(0)
+                used_bytes_proc_call = subprocess.check_output(['du', '-bsx', UI2CS_FILE_CHANNELS_PATH]).split()
+                if len(used_bytes_proc_call) > 0:
+                    cs_used_bytes = int(used_bytes_proc_call[0].decode('utf-8'))
+                else:
+                    g_utils.logger.error("Error in disk usage call.")
+                    break
+            total_deleted_size = total_deleted_size - cs_used_bytes
+        else:
+            total_deleted_size = 0
+            g_utils.logger.info("No files Removed.")
+    else:
+        g_utils.logger.error("Error in disk usage call.")
+
+    return num_files_deleted, total_deleted_size