diff --git a/files/file.go b/files/file.go
index fe18286..9435016 100644
--- a/files/file.go
+++ b/files/file.go
@@ -1,5 +1,45 @@
-// Package file implements sessions saved into files which contains gob data
-package file
+// Package files implements sessions saved into filesystem persistently encoded using gob
+package files
+
+import (
+	"fmt"
+	"sync"
+)
+
+const (
+	sessDir string = "go-session"
+	sessExt string = "gsd"
+)
+
+func init() {
+
+}
+
+// ProviderFiles implement filesystem session provider
+type ProviderFiles struct {
+	sessPath string
+	lock     sync.Mutex
+}
+
+func (pder *ProviderFiles) ckdir() string {
+	return pder.sessPath + sessDir
+}
+
+// SetParams for files session provider set base path in filesystem for save sessions
+func (pder *ProviderFiles) SetParams(p any) (err error) {
+	if p != nil {
+		if s, ok := p.(string); ok {
+			pder.sessPath = s
+			return
+		}
+		return fmt.Errorf("Parameter for files session provider is not string")
+	}
+	return fmt.Errorf("Parameter for files session provider must not be nil")
+}
+
+// Init create session file if not exists and retturn *Session
+func (pder *ProviderFiles) Init(sid string) (err error) {
+	//sessdir := sid + sessExt
+	return
+}
 
-// SessionFile implement manager.Session interface
-type SessionFile struct{}