diff --git a/server/version/version.go b/server/version/version.go
index 6796588c..e5cf8c9b 100644
--- a/server/version/version.go
+++ b/server/version/version.go
@@ -9,10 +9,10 @@ import (
 
 // Version is the service current released version.
 // Semantic versioning: https://semver.org/
-var Version = "0.21.0"
+var Version = "0.22.0"
 
 // DevVersion is the service current development version.
-var DevVersion = "0.21.0"
+var DevVersion = "0.22.0"
 
 func GetCurrentVersion(mode string) string {
 	if mode == "dev" || mode == "demo" {
diff --git a/store/db/mysql/memo.go b/store/db/mysql/memo.go
index 9f3f30c7..77d9ea61 100644
--- a/store/db/mysql/memo.go
+++ b/store/db/mysql/memo.go
@@ -12,8 +12,8 @@ import (
 )
 
 func (d *DB) CreateMemo(ctx context.Context, create *store.Memo) (*store.Memo, error) {
-	fields := []string{"`uid`", "`creator_id`", "`content`", "`visibility`", "`tags`"}
-	placeholder := []string{"?", "?", "?", "?", "?"}
+	fields := []string{"`uid`", "`creator_id`", "`content`", "`visibility`", "`tags`", "`payload`"}
+	placeholder := []string{"?", "?", "?", "?", "?", "?"}
 	tags := "[]"
 	if len(create.Tags) != 0 {
 		tagsBytes, err := json.Marshal(create.Tags)
@@ -22,7 +22,7 @@ func (d *DB) CreateMemo(ctx context.Context, create *store.Memo) (*store.Memo, e
 		}
 		tags = string(tagsBytes)
 	}
-	args := []any{create.UID, create.CreatorID, create.Content, create.Visibility, tags}
+	args := []any{create.UID, create.CreatorID, create.Content, create.Visibility, tags, "{}"}
 
 	stmt := "INSERT INTO `memo` (" + strings.Join(fields, ", ") + ") VALUES (" + strings.Join(placeholder, ", ") + ")"
 	result, err := d.db.ExecContext(ctx, stmt, args...)
diff --git a/store/db/mysql/migration/dev/LATEST__SCHEMA.sql b/store/db/mysql/migration/dev/LATEST__SCHEMA.sql
index 13485010..3a3fb7d0 100644
--- a/store/db/mysql/migration/dev/LATEST__SCHEMA.sql
+++ b/store/db/mysql/migration/dev/LATEST__SCHEMA.sql
@@ -44,7 +44,8 @@ CREATE TABLE `memo` (
   `row_status` VARCHAR(256) NOT NULL DEFAULT 'NORMAL',
   `content` TEXT NOT NULL,
   `visibility` VARCHAR(256) NOT NULL DEFAULT 'PRIVATE',
-  `tags` JSON NOT NULL
+  `tags` JSON NOT NULL,
+  `payload` JSON NOT NULL
 );
 
 -- memo_organizer
@@ -80,13 +81,6 @@ CREATE TABLE `resource` (
   `payload` TEXT NOT NULL
 );
 
--- tag
-CREATE TABLE `tag` (
-  `name` VARCHAR(256) NOT NULL,
-  `creator_id` INT NOT NULL,
-  UNIQUE(`name`,`creator_id`)
-);
-
 -- activity
 CREATE TABLE `activity` (
   `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
diff --git a/store/db/mysql/migration/prod/0.22/02__memo_payload.sql b/store/db/mysql/migration/prod/0.22/02__memo_payload.sql
new file mode 100644
index 00000000..c9cbb142
--- /dev/null
+++ b/store/db/mysql/migration/prod/0.22/02__memo_payload.sql
@@ -0,0 +1,4 @@
+ALTER TABLE `memo` ADD COLUMN `payload_temp` JSON;
+UPDATE `memo` SET `payload_temp` = '{}';
+ALTER TABLE `memo` DROP COLUMN `payload`;
+ALTER TABLE `memo` CHANGE COLUMN `payload_temp` `payload` JSON NOT NULL;
diff --git a/store/db/mysql/migration/prod/0.22/03__drop_tag.sql b/store/db/mysql/migration/prod/0.22/03__drop_tag.sql
new file mode 100644
index 00000000..ba302faa
--- /dev/null
+++ b/store/db/mysql/migration/prod/0.22/03__drop_tag.sql
@@ -0,0 +1 @@
+DROP TABLE IF EXISTS `tag`;
diff --git a/store/db/mysql/migration/prod/LATEST__SCHEMA.sql b/store/db/mysql/migration/prod/LATEST__SCHEMA.sql
index c25caa06..3a3fb7d0 100644
--- a/store/db/mysql/migration/prod/LATEST__SCHEMA.sql
+++ b/store/db/mysql/migration/prod/LATEST__SCHEMA.sql
@@ -43,7 +43,9 @@ CREATE TABLE `memo` (
   `updated_ts` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
   `row_status` VARCHAR(256) NOT NULL DEFAULT 'NORMAL',
   `content` TEXT NOT NULL,
-  `visibility` VARCHAR(256) NOT NULL DEFAULT 'PRIVATE'
+  `visibility` VARCHAR(256) NOT NULL DEFAULT 'PRIVATE',
+  `tags` JSON NOT NULL,
+  `payload` JSON NOT NULL
 );
 
 -- memo_organizer
@@ -71,18 +73,12 @@ CREATE TABLE `resource` (
   `updated_ts` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
   `filename` TEXT NOT NULL,
   `blob` MEDIUMBLOB,
-  `external_link` TEXT NOT NULL,
   `type` VARCHAR(256) NOT NULL DEFAULT '',
   `size` INT NOT NULL DEFAULT '0',
-  `internal_path` VARCHAR(256) NOT NULL DEFAULT '',
-  `memo_id` INT DEFAULT NULL
-);
-
--- tag
-CREATE TABLE `tag` (
-  `name` VARCHAR(256) NOT NULL,
-  `creator_id` INT NOT NULL,
-  UNIQUE(`name`,`creator_id`)
+  `memo_id` INT DEFAULT NULL,
+  `storage_type` VARCHAR(256) NOT NULL DEFAULT '',
+  `reference` VARCHAR(256) NOT NULL DEFAULT '',
+  `payload` TEXT NOT NULL
 );
 
 -- activity
@@ -95,14 +91,6 @@ CREATE TABLE `activity` (
   `payload` TEXT NOT NULL
 );
 
--- storage
-CREATE TABLE `storage` (
-  `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
-  `name` VARCHAR(256) NOT NULL,
-  `type` VARCHAR(256) NOT NULL,
-  `config` TEXT NOT NULL
-);
-
 -- idp
 CREATE TABLE `idp` (
   `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
diff --git a/store/db/postgres/migration/dev/LATEST__SCHEMA.sql b/store/db/postgres/migration/dev/LATEST__SCHEMA.sql
index dba43e18..957eaced 100644
--- a/store/db/postgres/migration/dev/LATEST__SCHEMA.sql
+++ b/store/db/postgres/migration/dev/LATEST__SCHEMA.sql
@@ -44,7 +44,8 @@ CREATE TABLE memo (
   row_status TEXT NOT NULL DEFAULT 'NORMAL',
   content TEXT NOT NULL,
   visibility TEXT NOT NULL DEFAULT 'PRIVATE',
-  tags JSONB NOT NULL DEFAULT '[]'
+  tags JSONB NOT NULL DEFAULT '[]',
+  payload JSONB NOT NULL DEFAULT '{}'
 );
 
 -- memo_organizer
@@ -80,13 +81,6 @@ CREATE TABLE resource (
   payload TEXT NOT NULL DEFAULT '{}'
 );
 
--- tag
-CREATE TABLE tag (
-  name TEXT NOT NULL,
-  creator_id INTEGER NOT NULL,
-  UNIQUE(name, creator_id)
-);
-
 -- activity
 CREATE TABLE activity (
   id SERIAL PRIMARY KEY,
diff --git a/store/db/postgres/migration/prod/0.22/02__memo_payload.sql b/store/db/postgres/migration/prod/0.22/02__memo_payload.sql
new file mode 100644
index 00000000..68dc159c
--- /dev/null
+++ b/store/db/postgres/migration/prod/0.22/02__memo_payload.sql
@@ -0,0 +1 @@
+ALTER TABLE memo ADD COLUMN payload JSONB NOT NULL DEFAULT '{}';
diff --git a/store/db/postgres/migration/prod/0.22/03__drop_tag.sql b/store/db/postgres/migration/prod/0.22/03__drop_tag.sql
new file mode 100644
index 00000000..8e3d418e
--- /dev/null
+++ b/store/db/postgres/migration/prod/0.22/03__drop_tag.sql
@@ -0,0 +1 @@
+DROP TABLE IF EXISTS tag;
diff --git a/store/db/postgres/migration/prod/LATEST__SCHEMA.sql b/store/db/postgres/migration/prod/LATEST__SCHEMA.sql
index 06c422b9..957eaced 100644
--- a/store/db/postgres/migration/prod/LATEST__SCHEMA.sql
+++ b/store/db/postgres/migration/prod/LATEST__SCHEMA.sql
@@ -43,7 +43,9 @@ CREATE TABLE memo (
   updated_ts BIGINT NOT NULL DEFAULT EXTRACT(EPOCH FROM NOW()),
   row_status TEXT NOT NULL DEFAULT 'NORMAL',
   content TEXT NOT NULL,
-  visibility TEXT NOT NULL DEFAULT 'PRIVATE'
+  visibility TEXT NOT NULL DEFAULT 'PRIVATE',
+  tags JSONB NOT NULL DEFAULT '[]',
+  payload JSONB NOT NULL DEFAULT '{}'
 );
 
 -- memo_organizer
@@ -71,18 +73,12 @@ CREATE TABLE resource (
   updated_ts BIGINT NOT NULL DEFAULT EXTRACT(EPOCH FROM NOW()),
   filename TEXT NOT NULL,
   blob BYTEA,
-  external_link TEXT NOT NULL,
   type TEXT NOT NULL DEFAULT '',
   size INTEGER NOT NULL DEFAULT 0,
-  internal_path TEXT NOT NULL DEFAULT '',
-  memo_id INTEGER DEFAULT NULL
-);
-
--- tag
-CREATE TABLE tag (
-  name TEXT NOT NULL,
-  creator_id INTEGER NOT NULL,
-  UNIQUE(name, creator_id)
+  memo_id INTEGER DEFAULT NULL,
+  storage_type TEXT NOT NULL DEFAULT '',
+  reference TEXT NOT NULL DEFAULT '',
+  payload TEXT NOT NULL DEFAULT '{}'
 );
 
 -- activity
@@ -95,14 +91,6 @@ CREATE TABLE activity (
   payload JSONB NOT NULL DEFAULT '{}'
 );
 
--- storage
-CREATE TABLE storage (
-  id SERIAL PRIMARY KEY,
-  name TEXT NOT NULL,
-  type TEXT NOT NULL,
-  config JSONB NOT NULL DEFAULT '{}'
-);
-
 -- idp
 CREATE TABLE idp (
   id SERIAL PRIMARY KEY,
diff --git a/store/db/sqlite/migration/dev/LATEST__SCHEMA.sql b/store/db/sqlite/migration/dev/LATEST__SCHEMA.sql
index 231677d4..8052de8c 100644
--- a/store/db/sqlite/migration/dev/LATEST__SCHEMA.sql
+++ b/store/db/sqlite/migration/dev/LATEST__SCHEMA.sql
@@ -47,7 +47,8 @@ CREATE TABLE memo (
   row_status TEXT NOT NULL CHECK (row_status IN ('NORMAL', 'ARCHIVED')) DEFAULT 'NORMAL',
   content TEXT NOT NULL DEFAULT '',
   visibility TEXT NOT NULL CHECK (visibility IN ('PUBLIC', 'PROTECTED', 'PRIVATE')) DEFAULT 'PRIVATE',
-  tags TEXT NOT NULL DEFAULT '[]'
+  tags TEXT NOT NULL DEFAULT '[]',
+  payload TEXT NOT NULL DEFAULT '{}'
 );
 
 CREATE INDEX idx_memo_creator_id ON memo (creator_id);
@@ -92,13 +93,6 @@ CREATE INDEX idx_resource_creator_id ON resource (creator_id);
 
 CREATE INDEX idx_resource_memo_id ON resource (memo_id);
 
--- tag
-CREATE TABLE tag (
-  name TEXT NOT NULL,
-  creator_id INTEGER NOT NULL,
-  UNIQUE(name, creator_id)
-);
-
 -- activity
 CREATE TABLE activity (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
diff --git a/store/db/sqlite/migration/prod/0.22/02__memo_payload.sql b/store/db/sqlite/migration/prod/0.22/02__memo_payload.sql
new file mode 100644
index 00000000..267a7497
--- /dev/null
+++ b/store/db/sqlite/migration/prod/0.22/02__memo_payload.sql
@@ -0,0 +1 @@
+ALTER TABLE memo ADD COLUMN payload TEXT NOT NULL DEFAULT '{}';
diff --git a/store/db/sqlite/migration/prod/0.22/03__drop_tag.sql b/store/db/sqlite/migration/prod/0.22/03__drop_tag.sql
new file mode 100644
index 00000000..6411efb7
--- /dev/null
+++ b/store/db/sqlite/migration/prod/0.22/03__drop_tag.sql
@@ -0,0 +1 @@
+DROP TABLE tag;
\ No newline at end of file
diff --git a/store/db/sqlite/migration/prod/LATEST__SCHEMA.sql b/store/db/sqlite/migration/prod/LATEST__SCHEMA.sql
index def1d7dc..8052de8c 100644
--- a/store/db/sqlite/migration/prod/LATEST__SCHEMA.sql
+++ b/store/db/sqlite/migration/prod/LATEST__SCHEMA.sql
@@ -46,12 +46,15 @@ CREATE TABLE memo (
   updated_ts BIGINT NOT NULL DEFAULT (strftime('%s', 'now')),
   row_status TEXT NOT NULL CHECK (row_status IN ('NORMAL', 'ARCHIVED')) DEFAULT 'NORMAL',
   content TEXT NOT NULL DEFAULT '',
-  visibility TEXT NOT NULL CHECK (visibility IN ('PUBLIC', 'PROTECTED', 'PRIVATE')) DEFAULT 'PRIVATE'
+  visibility TEXT NOT NULL CHECK (visibility IN ('PUBLIC', 'PROTECTED', 'PRIVATE')) DEFAULT 'PRIVATE',
+  tags TEXT NOT NULL DEFAULT '[]',
+  payload TEXT NOT NULL DEFAULT '{}'
 );
 
 CREATE INDEX idx_memo_creator_id ON memo (creator_id);
 CREATE INDEX idx_memo_content ON memo (content);
 CREATE INDEX idx_memo_visibility ON memo (visibility);
+CREATE INDEX idx_memo_tags ON memo (tags);
 
 -- memo_organizer
 CREATE TABLE memo_organizer (
@@ -78,24 +81,18 @@ CREATE TABLE resource (
   updated_ts BIGINT NOT NULL DEFAULT (strftime('%s', 'now')),
   filename TEXT NOT NULL DEFAULT '',
   blob BLOB DEFAULT NULL,
-  external_link TEXT NOT NULL DEFAULT '',
   type TEXT NOT NULL DEFAULT '',
   size INTEGER NOT NULL DEFAULT 0,
-  internal_path TEXT NOT NULL DEFAULT '',
-  memo_id INTEGER
+  memo_id INTEGER,
+  storage_type TEXT NOT NULL DEFAULT '',
+  reference TEXT NOT NULL DEFAULT '',
+  payload TEXT NOT NULL DEFAULT '{}'
 );
 
 CREATE INDEX idx_resource_creator_id ON resource (creator_id);
 
 CREATE INDEX idx_resource_memo_id ON resource (memo_id);
 
--- tag
-CREATE TABLE tag (
-  name TEXT NOT NULL,
-  creator_id INTEGER NOT NULL,
-  UNIQUE(name, creator_id)
-);
-
 -- activity
 CREATE TABLE activity (
   id INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -106,14 +103,6 @@ CREATE TABLE activity (
   payload TEXT NOT NULL DEFAULT '{}'
 );
 
--- storage
-CREATE TABLE storage (
-  id INTEGER PRIMARY KEY AUTOINCREMENT,
-  name TEXT NOT NULL,
-  type TEXT NOT NULL,
-  config TEXT NOT NULL DEFAULT '{}'
-);
-
 -- idp
 CREATE TABLE idp (
   id INTEGER PRIMARY KEY AUTOINCREMENT,