diff --git a/fuse/mock.go b/fuse/mock.go
index 7df66b1..17af7d0 100644
--- a/fuse/mock.go
+++ b/fuse/mock.go
@@ -1,8 +1,40 @@
 package main
+import (
+	"io/fs"
+	"errors"
+)
+
+var (
+	ErrFileNotExists = errors.New("file does not exist")
+	ErrFileReadOnly  = errors.New("file is read only")
+	ErrFileWriteOnly = errors.New("file is write only")
+	ErrInvalidOffset = errors.New("invalid file offset")
+	ErrOffsetChanged = errors.New("offset has already been changed")
+	ErrReadOpen      = errors.New("only one file can be opened for reading at a time")
+	ErrWriteOpen     = errors.New("only one file can be opened for writing at a time")
+	ErrNoRemoveRoot  = errors.New("refusing to remove root directory")
+)
 
 type Device struct {
-
 }
+type FS struct {
+}
+
+
+type File struct {
+	fs            *FS
+	path          string
+	offset        uint32
+	offsetCh      chan uint32
+	length        uint32
+	amtLeft       uint32
+	amtTferd      uint32
+	isReadOnly    bool
+	isWriteOnly   bool
+	offsetChanged bool
+}
+
+
 
 func (i *Device) HeartRate() (uint8, error) {
 	return 10, nil
@@ -33,3 +65,42 @@ func (i *Device) Address() string {
 func (i *Device) Version() (string, error) {
 	return "1.11.0", nil
 }
+
+func (blefs *FS) ReadDir(path string) ([]fs.DirEntry, error) {
+	var out []fs.DirEntry
+	return out, nil
+}
+
+func (blefs *FS) Mkdir(path string) error {
+	return nil
+}
+
+func (blefs *FS) Stat(path string) (fs.FileInfo, error) {
+	return nil, ErrFileNotExists
+}
+
+func (blefs *FS) Rename(old, new string) error {
+	return nil
+}
+
+func (blefs *FS) Remove(path string) error {
+	return nil
+}
+
+func (blefs *FS) Open(path string) (*File, error) {
+	return &File{}, nil
+}
+func (blefs *FS) Create(path string, size uint32) (*File, error) {
+	return &File{}, nil
+}
+func (fl *File) Read(b []byte) (n int, err error) {
+	return 0, ErrFileWriteOnly
+}
+func (fl *File) Write(b []byte) (n int, err error) {
+	return 0, ErrFileWriteOnly
+}
+func (fl *File) Close() error {
+	return nil
+}
+// func (fl *File) Stat() (fs.FileInfo, error) {
+// }