diff --git a/docs/DeveloperGuide.md b/docs/DeveloperGuide.md
index 92103bd4900..8e46c8da45d 100644
--- a/docs/DeveloperGuide.md
+++ b/docs/DeveloperGuide.md
@@ -376,7 +376,11 @@ execution.
 
 This can be seen in the sequence diagram below
 
-<puml src="diagrams/StorageInitSequenceDiagram.puml" />
+<puml src="diagrams/StorageInitSequenceDiagram.puml" width="600"/>
+<puml src="diagrams/StorageInitUserPrefSequenceDiagram.puml" width="5500" />
+<puml src="diagrams/StorageInitStorageManagerSequenceDiagram.puml" width="400"/>
+<puml src="diagrams/StorageInitModulePlanSequenceDiagram.puml" />
+
 
 <br>
 
@@ -541,7 +545,6 @@ The following activity diagrams show the logic of deleting a `Module` from the m
 
 <puml src="diagrams/DeleteCommandActivityDiagram.puml" width="600" />
 
-<puml src="diagrams/DeleteCommandActivityDiagram2.puml" width="600" />
 
 <br>
 
@@ -559,6 +562,8 @@ The following sequence diagram shows how the `delete` command works:
 
 <puml src="diagrams/DeleteCommandSequenceDiagram.puml" />
 
+<puml src="diagrams/DeleteCommandSequenceDiagram2.puml" width="600" />
+
 <br>
 
 --------------------------------------------------------------------------------------------------------------------
diff --git a/docs/diagrams/StorageInitModulePlanSequenceDiagram.puml b/docs/diagrams/StorageInitModulePlanSequenceDiagram.puml
new file mode 100644
index 00000000000..235103a7ad9
--- /dev/null
+++ b/docs/diagrams/StorageInitModulePlanSequenceDiagram.puml
@@ -0,0 +1,70 @@
+@startuml
+!include style.puml
+skinparam ArrowFontStyle plain
+
+mainframe sd Init Module Plan
+
+box Main LOGIC_COLOR_T2
+participant ":MainApp" as MainApp LOGIC_COLOR_T2
+
+box Database DATABASE_COLOR_T1
+participant "mp:ModulePlan" as ModulePlan DATABASE_COLOR
+participant "jsonModulePlan:JsonSerializableModulePlan" as SerializableModulePlan DATABASE_COLOR
+participant "mps:ModulePlanStorage" as ModulePlanStorage DATABASE_COLOR
+end box
+
+
+box Model MODEL_COLOR_T1
+participant "plan:ModulePlan" as ModulePlan MODEL_COLOR_T1
+end box
+
+box Commons LOGIC_COLOR_T1
+participant "<<class>>\nJsonutil" as JsonUtil LOGIC_COLOR_T2
+end box
+
+activate MainApp
+
+
+MainApp -> MainApp : initModelManager()
+activate MainApp
+
+MainApp -> ModulePlanStorage : readModulePlan()
+activate ModulePlanStorage
+
+ModulePlanStorage -> JsonUtil : readJsonFile(filePath, ModulePlanStorage.class)
+activate JsonUtil
+
+create SerializableModulePlan
+JsonUtil -> SerializableModulePlan
+activate SerializableModulePlan
+
+
+
+SerializableModulePlan --> JsonUtil : jsonModulePlan
+deactivate SerializableModulePlan
+
+JsonUtil --> ModulePlanStorage : jsonModulePlan
+deactivate JsonUtil
+
+ModulePlanStorage ->  SerializableModulePlan : toModelType()
+activate SerializableModulePlan
+
+create ModulePlan
+SerializableModulePlan -> ModulePlan
+activate ModulePlan
+
+ModulePlan --> SerializableModulePlan : mp
+deactivate ModulePlan
+
+
+SerializableModulePlan --> ModulePlanStorage : mp
+deactivate SerializableModulePlan
+
+ModulePlanStorage --> MainApp : mp
+deactivate ModulePlanStorage
+
+MainApp --> MainApp : model
+
+deactivate MainApp
+
+@enduml
diff --git a/docs/diagrams/StorageInitSequenceDiagram.puml b/docs/diagrams/StorageInitSequenceDiagram.puml
index b9b6c0f8b58..6e661f1e241 100644
--- a/docs/diagrams/StorageInitSequenceDiagram.puml
+++ b/docs/diagrams/StorageInitSequenceDiagram.puml
@@ -7,21 +7,13 @@ participant ":MainApp" as MainApp LOGIC_COLOR_T2
 
 box Database DATABASE_COLOR_T1
 participant "ups:UserPrefsStorage" as UserPrefsStorage DATABASE_COLOR
-participant "up:UserPrefs" as UserPrefs DATABASE_COLOR
 participant "mps:ModulePlanStorage" as ModulePlanStorage DATABASE_COLOR
-participant "mp:ModulePlan" as ModulePlan DATABASE_COLOR
-participant "jsonModulePlan:JsonSerializableModulePlan" as SerializableModulePlan DATABASE_COLOR
-participant ":JsonAdaptedModule" as JsonAdaptedModule DATABASE_COLOR
 end box
 
 box Storage MODEL_COLOR_T2
 participant "storage:StorageManager" as StorageManager MODEL_COLOR_T2
 
 
-box Model MODEL_COLOR_T1
-participant "m:Module" as Module MODEL_COLOR_T1
-participant "plan:ModulePlan" as ModulePlan MODEL_COLOR_T1
-end box
 
 box Commons LOGIC_COLOR_T1
 participant "<<class>>\nJsonutil" as JsonUtil LOGIC_COLOR_T2
@@ -30,127 +22,14 @@ end box
 [-> MainApp :
 activate MainApp
 
-MainApp -> MainApp : initConfig(config)
-activate MainApp
-MainApp --> MainApp : config
-deactivate MainApp
-
-MainApp -> UserPrefsStorage : JsonUserPrefsStorage()
-activate UserPrefsStorage
-
-UserPrefsStorage --> MainApp : ups
-deactivate UserPrefsStorage
-
-MainApp -> MainApp : initPrefs(config)
-activate MainApp
-
-MainApp -> UserPrefsStorage : ups.readUserPrefs()
-activate UserPrefsStorage
-
-UserPrefsStorage -> JsonUtil : readJsonFile(filePath, SerializableModulePlan.class)
-activate JsonUtil
-
-JsonUtil -> UserPrefs
-activate UserPrefs
-
-UserPrefs --> JsonUtil : up
-deactivate UserPrefs
-
-JsonUtil --> UserPrefsStorage : up
-deactivate JsonUtil
-
-UserPrefsStorage --> MainApp : up
-deactivate UserPrefsStorage
-
-MainApp --> MainApp : up
-
-MainApp -> ModulePlanStorage
-activate ModulePlanStorage
-
-ModulePlanStorage --> MainApp : mps
-deactivate ModulePlanStorage
-
-deactivate MainApp
-
-MainApp -> StorageManager : StorageManager(ModulePlanStorage, UserPrefsStorage)
-activate StorageManager
-
-StorageManager --> MainApp : storage
-deactivate StorageManager
-
-
-MainApp -> MainApp : initModelManager()
-activate MainApp
-
-MainApp -> StorageManager : readModulePlan()
-activate StorageManager
-
-StorageManager -> ModulePlanStorage : readModulePlan(filePath)
-deactivate StorageManager
-activate ModulePlanStorage
-
-ModulePlanStorage -> JsonUtil : readJsonFile(filePath, ModulePlanStorage.class)
-activate JsonUtil
-
-create SerializableModulePlan
-JsonUtil -> SerializableModulePlan
-activate SerializableModulePlan
-
-loop for each module
-create JsonAdaptedModule
-SerializableModulePlan -> JsonAdaptedModule
-activate JsonAdaptedModule
-
-JsonAdaptedModule --> SerializableModulePlan
-deactivate JsonAdaptedModule
-
-end
-
-SerializableModulePlan --> JsonUtil : jsonData
-deactivate SerializableModulePlan
-
-JsonUtil --> ModulePlanStorage : jsonModulePlan
-
-ModulePlanStorage -->  SerializableModulePlan : toModelType()
-activate SerializableModulePlan
-
-create ModulePlan
-SerializableModulePlan -> ModulePlan
-activate ModulePlan
-
-ModulePlan -> SerializableModulePlan : plan
-deactivate ModulePlan
-
-loop for each module
-SerializableModulePlan -> JsonAdaptedModule : toModelType()
-activate JsonAdaptedModule
-
-create Module
-JsonAdaptedModule -> Module
-activate Module
-
-Module --> JsonAdaptedModule : m
-deactivate module
-
-JsonAdaptedModule --> SerializableModulePlan : m
-deactivate JsonAdaptedModule
-
-SerializableModulePlan -> ModulePlan : addModule(m)
-activate ModulePlan
-
-ModulePlan --> SerializableModulePlan
-deactivate ModulePlan
-
-end
+ref over MainApp, UserPrefsStorage, JsonUtil : Init User Pref
 
-SerializableModulePlan --> ModulePlanStorage : plan
-deactivate SerializableModulePlan
+ref over MainApp, ModulePlanStorage, StorageManager: Init Storage Manager
 
-ModulePlanStorage -> MainApp : plan
-deactivate ModulePlanStorage
+ref over MainApp, ModulePlanStorage, JsonUtil : Init Module Plan
 
-MainApp --> MainApp : model
 
+[<-- MainApp :
 deactivate MainApp
 
 @enduml
diff --git a/docs/diagrams/StorageInitStorageManagerSequanceDiagram.puml b/docs/diagrams/StorageInitStorageManagerSequanceDiagram.puml
new file mode 100644
index 00000000000..2fd98292236
--- /dev/null
+++ b/docs/diagrams/StorageInitStorageManagerSequanceDiagram.puml
@@ -0,0 +1,33 @@
+@startuml
+!include style.puml
+skinparam ArrowFontStyle plain
+
+mainframe sd Init Storage Manager
+
+box Main LOGIC_COLOR_T2
+participant ":MainApp" as MainApp LOGIC_COLOR_T2
+
+box Database DATABASE_COLOR_T1
+participant "mps:ModulePlanStorage" as ModulePlanStorage DATABASE_COLOR
+end box
+
+box Storage MODEL_COLOR_T2
+participant "storage:StorageManager" as StorageManager MODEL_COLOR_T2
+
+activate MainApp
+
+MainApp -> ModulePlanStorage
+activate ModulePlanStorage
+
+ModulePlanStorage --> MainApp : mps
+deactivate ModulePlanStorage
+
+
+MainApp -> StorageManager : StorageManager(ModulePlanStorage, UserPrefsStorage)
+activate StorageManager
+
+StorageManager --> MainApp : storage
+deactivate StorageManager
+
+
+@enduml
diff --git a/docs/diagrams/StorageInitiUserPrefSequenceDiagram.puml b/docs/diagrams/StorageInitiUserPrefSequenceDiagram.puml
new file mode 100644
index 00000000000..88348724ce8
--- /dev/null
+++ b/docs/diagrams/StorageInitiUserPrefSequenceDiagram.puml
@@ -0,0 +1,58 @@
+@startuml
+!include style.puml
+skinparam ArrowFontStyle plain
+
+mainframe sd Init User Pref
+
+box Main LOGIC_COLOR_T2
+participant ":MainApp" as MainApp LOGIC_COLOR_T2
+
+box Database DATABASE_COLOR_T1
+participant "ups:UserPrefsStorage" as UserPrefsStorage DATABASE_COLOR
+participant "up:UserPrefs" as UserPrefs DATABASE_COLOR
+end box
+
+box Commons LOGIC_COLOR_T1
+participant "<<class>>\nJsonutil" as JsonUtil LOGIC_COLOR_T2
+end box
+
+activate MainApp
+
+MainApp -> MainApp : initConfig(config)
+activate MainApp
+MainApp --> MainApp : config
+deactivate MainApp
+
+MainApp -> UserPrefsStorage : JsonUserPrefsStorage()
+activate UserPrefsStorage
+
+UserPrefsStorage --> MainApp : ups
+deactivate UserPrefsStorage
+
+MainApp -> MainApp : initPrefs(ups)
+activate MainApp
+
+MainApp -> UserPrefsStorage : ups.readUserPrefs()
+activate UserPrefsStorage
+
+UserPrefsStorage -> JsonUtil : readJsonFile(filePath, SerializableModulePlan.class)
+activate JsonUtil
+
+create UserPrefs
+JsonUtil -> UserPrefs
+activate UserPrefs
+
+UserPrefs --> JsonUtil : up
+deactivate UserPrefs
+
+JsonUtil --> UserPrefsStorage : up
+deactivate JsonUtil
+
+UserPrefsStorage --> MainApp : up
+deactivate UserPrefsStorage
+
+MainApp --> MainApp : up
+deactivate MainApp
+
+
+@enduml