diff --git a/altsrc/common.cr b/altsrc/common.cr
new file mode 100644
index 0000000..0c6cd8b
--- /dev/null
+++ b/altsrc/common.cr
@@ -0,0 +1,70 @@
+require "uuid"
+require "uuid/json"
+
+class TodoD
+end
+
+class TodoD::List
+	enum PermissionLevel
+		None = -1
+		Read
+		Post
+		Edit
+		Admin
+
+		def to_json(o)
+			to_s.downcase.to_json(o)
+		end
+	end
+
+	JSON.mapping({
+		id: String,
+		title: String,
+		permissions: Hash(String, Array(Int32)),
+		extra_properties: Hash(String, JSON::Any),
+		tasks: {
+			type: Array(String),
+			default: [] of String
+		}
+	})
+
+	def initialize(@title, user, @extra_properties = Hash(String, JSON::Any).new)
+		@id = UUID.random.to_s
+		@permissions = {
+			"admin" => [user.uid],
+			"edit" => [] of Int32,
+			"post" => [] of Int32,
+			"read" => [] of Int32
+		}
+		@tasks = [] of String
+	end
+end
+
+class TodoD::Task
+	# Should we hardcode more properties here?
+	JSON.mapping({
+		id: String,
+		list: String,
+		title: String,
+		description: {
+			type: String,
+			default: ""
+		},
+		creator: Int32,
+		assigned_to: Int32?,
+		priority: String?,
+		tags: {
+			type: Array(String),
+			default: [] of String
+		},
+		extra_properties: {
+			type: Hash(String, JSON::Any),
+			default: {} of String => JSON::Any
+		}
+	})
+
+	def initialize(@list, @title, @creator, @description = "", @assigned_to = nil, @priority = nil, @tags = [] of String, @extra_properties = {} of String => JSON::Any)
+		@id = UUID.random.to_s
+	end
+end
+
diff --git a/altsrc/main.cr b/altsrc/main.cr
new file mode 100644
index 0000000..9bfa9f9
--- /dev/null
+++ b/altsrc/main.cr
@@ -0,0 +1,25 @@
+require "option_parser"
+require "uuid"
+require "uuid/json"
+
+require "fs"
+
+class TodoD::Storage
+	getter root : String
+
+	getter lists : FS::Hash(String, List)
+	getter tasks : FS::Hash(String, Task)
+
+	def initialize(@root)
+		@lists = FS::Hash(String, List).new("#{@root}/lists").tap do |lists|
+			lists.new_nn_partition "user", &.users_with_read_permissions.map(&.to_s)
+		end
+
+		@tasks = FS::Hash(String, Task).new("#{@root}/tasks").tap do |tasks|
+		end
+	end
+
+	def new_list(list)
+		@lists[list.id] = list
+	end
+end
diff --git a/altsrc/todod.cr b/altsrc/todod.cr
new file mode 100644
index 0000000..e69de29
diff --git a/conversion.cr b/conversion.cr
new file mode 100644
index 0000000..f2e43e7
--- /dev/null
+++ b/conversion.cr
@@ -0,0 +1,132 @@
+
+require "json"
+require "./src/project.cr"
+
+# require "./altsrc/common.cr"
+# require "./altsrc/main.cr"
+
+
+# 1. get the old list of projects
+old_storage = Project.all "../storage/"
+
+# JSON.mapping({
+# 	id: String,
+# 	name: String,
+# 	columns: Array(Column),
+# 	tasks: Array(Task),
+# })
+
+# 2. for each project
+# pp! old_storage
+old_storage.each do |old_project|
+	puts "projet #{old_project.name}"
+
+	extra_properties = Hash(String, JSON::Any).new
+	extra_properties["columns"] = JSON.parse(old_project.columns.to_json)
+	pp! extra_properties["columns"]
+
+	# 1. create a new list an copy all properties
+
+	tasks = Array(TodoD::Task).new
+
+	old_project.tasks.each do |t|
+		pp! t
+
+		task_extra_properties = Hash(String, JSON::Any).new
+		task_extra_properties["column"] = JSON.parse(t.column.to_json)
+		task_extra_properties["backgroundColor"] = JSON.parse(t.column.to_json)
+		task_extra_properties["assigneeId"] = JSON.parse(t.column.to_json)
+
+		newtask = ::TodoD::Task.new old_project.id, old_project.name, t.author,
+			description: (t.description || ""),
+			assigned_to: t.assigned_to,
+			extra_properties: task_extra_properties
+
+
+		# TASK
+
+			# @color="dark",
+			# @description="",
+			# @id="9808dcf2-1064-4b55-a39a-e402b477d60e",
+			# @title="fsdb automatic tests">
+
+ 
+		# 1. get the task in the old storage
+			# TODO
+		# 2. create a task in the new format
+
+			# task = ::TodoD::Task.new @list.to_s, @title, user.uid,
+			# 	description: (@description || ""),
+			# 	assigned_to: @assigned_to,
+			# 	extra_properties: @extra_properties || {} of String => JSON::Any
+
+		# 3. store the new task
+			# list.tasks << task.id
+			# service.storage.tasks[task.id] = task
+	end
+
+	# finally, create the list with all the parameters
+
+	# list = List.new old_project.name, user, extra_properties
+	# list.tasks = tasks.map &.id
+
+
+
+
+
+	####### service.storage.lists.delete list.id
+
+	# Store the new list
+	# service.storage.lists[list.id] = list
+
+		# EDIT TASK
+			# task = service.storage.tasks[@task.to_s]?
+			# list = service.storage.lists[task.list.to_s]?
+
+			# @title.try            { |x| task.title            = x }
+			# @description.try      { |x| task.description      = x }
+			# @tags.try             { |x| task.tags             = x }
+			# @assigned_to.try      { |x| task.assigned_to      = x }
+			# @extra_properties.try { |x| task.extra_properties = x }
+
+			# service.storage.tasks.delete task.id
+			# service.storage.tasks[task.id] = task
+		# EDIT LIST
+
+			# list = service.storage.lists[@list.to_s]
+
+			# # Updating our list copy.
+			# @title.try do |title|
+			# 	list.title = title
+			# end
+
+			# @permissions.try do |permissions|
+			# 	permissions.each do |key, value|
+			# 		list.permissions[key] = value
+			# 	end
+			# end
+
+			# @extra_properties.try do |properties|
+			# 	properties.each do |key, value|
+			# 		list.extra_properties[key] = value
+			# 	end
+			# end
+
+			# # Removal and re-adding is the current way of handling updates.
+			# service.storage.lists.delete list.id
+			# service.storage.lists[list.id] = list
+
+end
+
+# new_storage = TodoD::Storage.new "../new-storage/"
+
+#			service.storage.lists.delete list.id
+#			service.storage.lists.get_nn_partition(
+#			service.storage.lists[list.id] = list
+#			service.storage.lists[@list.to_s]
+#			service.storage.lists[@list.to_s]?
+#			service.storage.lists[task.list.to_s]?
+#			service.storage.tasks.delete task.id
+#			service.storage.tasks[task.id] = task
+#			service.storage.tasks[@task.to_s]?
+#			service.storage.tasks[uuid]
diff --git a/src/project.cr b/src/project.cr
index 2ebcb20..a6127eb 100644
--- a/src/project.cr
+++ b/src/project.cr
@@ -51,4 +51,3 @@ class Project
 		[] of Project
 	end
 end
-