Meizu MX - Manual (Page 61)

App guide 57
2 Type a folder name, then tap "Save".
Renaming a file or folder
1 Open "Documents", select the file or folder > "Options+" or "Options" > "Rename".
2 Rename the file or folder title, then tap "Save".
3 At the same time check more than one file or folder to rename, edit the folder
name, then tap the keyboard "under A "Rename the folder when all finished, tap"
Save. "
Sorting documents
Documents can be sorted by name or file size.
Open "Documents", tap the phone's Menu key > "Sort by size", tap the phone
menu key again > "Sort by type" to switch sorting method.