diff --git a/dataswamp/namespace/repository_contract.go b/dataswamp/namespace/repository_contract.go
new file mode 100644
index 0000000..dbb7151
--- /dev/null
+++ b/dataswamp/namespace/repository_contract.go
@@ -0,0 +1,53 @@
+package namespace
+
+import (
+	"github.com/matryer/is"
+	"testing"
+	"time"
+)
+
+func RepositoryContract(fac func() Repository, t *testing.T) {
+	basicNamespaceContract(fac, t)
+}
+
+func basicNamespaceContract(fac func() Repository, t *testing.T) {
+	is := is.New(t)
+	r := fac()
+
+	all, err := r.All()
+
+	is.NoErr(err)
+	is.Equal(len(all), 0)
+
+	ns := Namespace{
+		23,
+		"n1",
+		time.Now(),
+		time.Duration(time.Hour * 3),
+		FileSizeQuota{1000, 0},
+		Usage{1, 2, 3, 4, 5},
+	}
+
+	ns1, _ := r.Create(ns)
+	ns.Name = "n2"
+	ns2, _ := r.Create(ns)
+	is.True(ns1 != ns2)
+
+	all, err = r.All()
+
+	is.NoErr(err)
+	is.Equal(len(all), 2)
+
+	is.Equal(ns.ID, int64(23))
+
+	ns3, _ := r.GetByName("n2")
+
+	is.Equal(ns3, ns2)
+
+	is.NoErr(r.Delete(ns2.ID))
+
+	all, err = r.All()
+
+	is.NoErr(err)
+	is.Equal(len(all), 1)
+}
diff --git a/dataswamp/namespace/valueobjects.go b/dataswamp/namespace/valueobjects.go
index d47f04f..2675c36 100644
--- a/dataswamp/namespace/valueobjects.go
+++ b/dataswamp/namespace/valueobjects.go
@@ -34,6 +34,7 @@ func (f *FileSizeQuota) Remove(size int64) error {
 }
 
 type Usage struct {
+	Stored    int64
 	Uploads   int64
 	UploadB   int64
 	Downloads int64
@@ -42,6 +43,7 @@ type Usage struct {
 
 func (u Usage) Uploaded(size int64) Usage {
 	return Usage{
+		u.Stored,
 		u.Uploads + 1,
 		u.UploadB + size,
 		u.Downloads,
@@ -51,6 +53,7 @@ func (u Usage) Uploaded(size int64) Usage {
 
 func (u Usage) Downloaded(size int64) Usage {
 	return Usage{
+		u.Stored,
 		u.Uploads,
 		u.UploadB,
 		u.Downloads + 1,
diff --git a/dataswamp/services.go b/dataswamp/services.go
index a9fae27..c9ea65e 100644
--- a/dataswamp/services.go
+++ b/dataswamp/services.go
@@ -38,7 +38,7 @@ func (s SwampFileService) getOrCreateNs(namespace_in string) *namespace.Namespac
 			time.Now(),
 			s.default_allowance_duration,
 			namespace.FileSizeQuota{s.default_allowance_bytes, 0},
-			namespace.Usage{0, 0, 0, 0},
+			namespace.Usage{0, 0, 0, 0, 0},
 		}
 		created_ns, err := s.namespace_repo.Create(new_ns)
 
@@ -93,6 +93,7 @@ func (s SwampFileService) SaveFile(ref swampfile.FileReference, src io.Reader, s
 
 	f.Close()
 	ns.FileQuota.Add(size)
+	ns.Usage = ns.Usage.Downloaded(size)
 	s.namespace_repo.Update(ns.ID, *ns)
 
 	return nil
diff --git a/infrastructure/memory/namespace/repository.go b/infrastructure/memory/namespace/repository.go
index 3f662c5..02128df 100644
--- a/infrastructure/memory/namespace/repository.go
+++ b/infrastructure/memory/namespace/repository.go
@@ -11,7 +11,7 @@ type Repository struct {
 	NextId  int64
 }
 
-func NewRepository() *Repository {
+func NewRepository() namespace.Repository {
 	r := new(Repository)
 	r.NextId = 0
 	r.IdIdx = make(map[int64]*namespace.Namespace)
diff --git a/infrastructure/memory/namespace/repository_test.go b/infrastructure/memory/namespace/repository_test.go
index e68cc1a..8720769 100644
--- a/infrastructure/memory/namespace/repository_test.go
+++ b/infrastructure/memory/namespace/repository_test.go
@@ -2,49 +2,9 @@ package namespace
 
 import (
 	"caj-larsson/bog/dataswamp/namespace"
-	"github.com/matryer/is"
 	"testing"
-	"time"
 )
 
-func TestUserAgentRepo(t *testing.T) {
-	is := is.New(t)
-	r := NewRepository()
-
-	all, err := r.All()
-
-	is.NoErr(err)
-	is.Equal(len(all), 0)
-
-	ns := namespace.Namespace{
-		23,
-		"n1",
-		time.Now(),
-		time.Duration(time.Hour * 3),
-		namespace.FileSizeQuota{1000, 0},
-		namespace.Usage{0, 0, 0, 0},
-	}
-
-	ns1, _ := r.Create(ns)
-	ns.Name = "n2"
-	ns2, _ := r.Create(ns)
-	is.True(ns1 != ns2)
-
-	all, err = r.All()
-
-	is.NoErr(err)
-	is.Equal(len(all), 2)
-
-	is.Equal(ns.ID, int64(23))
-
-	ns3, _ := r.GetByName("n2")
-
-	is.Equal(ns3, ns2)
-
-	is.NoErr(r.Delete(ns2.ID))
-
-	all, err = r.All()
-
-	is.NoErr(err)
-	is.Equal(len(all), 1)
+func TestFileRepo(t *testing.T) {
+	namespace.RepositoryContract(NewRepository, t)
 }
diff --git a/infrastructure/sqlite/namespace/repository.go b/infrastructure/sqlite/namespace/repository.go
index 434b4ec..191e985 100644
--- a/infrastructure/sqlite/namespace/repository.go
+++ b/infrastructure/sqlite/namespace/repository.go
@@ -11,7 +11,7 @@ type Repository struct {
 	db *sql.DB
 }
 
-func NewRepository(filename string) *Repository {
+func NewRepository(filename string) namespace.Repository {
 	db, err := sql.Open("sqlite3", filename)
 	if err != nil {
 		panic(err)
diff --git a/infrastructure/sqlite/namespace/repository_test.go b/infrastructure/sqlite/namespace/repository_test.go
new file mode 100644
index 0000000..7477352
--- /dev/null
+++ b/infrastructure/sqlite/namespace/repository_test.go
@@ -0,0 +1,16 @@
+package namespace
+
+import (
+	"caj-larsson/bog/dataswamp/namespace"
+	"path"
+	"testing"
+)
+
+func TestFileRepo(t *testing.T) {
+	fac := func() namespace.Repository {
+		d := t.TempDir()
+		db_path := path.Join(d, "db.sql")
+		return NewRepository(db_path)
+	}
+	namespace.RepositoryContract(fac, t)
+}