Update.

RouterOS_File_Logging.rsc

@@ -0,0 +1,39 @@
+# RouterOS Function
+# Copyright (c) Grzegorz Budny 
+# Adds log entry if file is removed or added 
+
+:global FileToLog do={
+
+    :local fileName "FilesCount.txt";
+    :local fileCountOld;
+    :local fileCountCurrent; 
+
+    :if ([:len [/file find name=$fileName]] <= 0) do={
+
+        /file print file=$fileName;
+        :delay 5;
+        /file set $fileName contents=[/file print count-only];
+
+    }\
+    else={
+
+        :set $fileCountOld [/file get $fileName contents];
+        :set $fileCountCurrent [/file print count-only];
+
+        :if ($fileCountCurrent > $fileCountOld) do={
+
+            :log warning "File has been added";
+            /file set $fileName contents=$fileCountCurrent;
+
+        }
+        :if ($fileCountCurrent < $fileCountOld) do={
+
+            :log warning "File has been removed";
+            /file set $fileName contents=$fileCountCurrent;
+
+        }
+
+    }
+}
+
+$FileToLog;