After using an Android phone for a period of time, the SD card will generate various directories due to installed apps. Even after flashing the phone, those directories will still exist. So, which of these directories can be deleted? Let me take you through the explanation of the Android phone SD card directory:
1. .android_secure: Product of the official app2sd. Deleting it will make software installed on the SD card unusable.
2. .Bluetooth: As the name suggests, this appears after using Bluetooth.
3. .mobo: As the name suggests, the cache files of Moboplayer.
4. .QQ: As the name suggests, the cache files of QQ.
5. .quickoffice: As the name suggests, the cache files of Quickoffice.
6. .switchpro: As the name suggests, the cache files of SwitchPro Widget (multi-button switch).
7. .ucdlres: As the name suggests, the cache files of UC Thunder.
8. albumart: Cache folder for music album covers.
9. albums: Cache folder for photo thumbnails.
10. Android: A relatively important folder containing some program data, such as Google Maps map cache.
11. backups: Some backup files, for example, when contacts are exported to the SD card, they are stored in this folder.
12. baidu: As the name suggests, a cache folder for apps like Baidu Mobile and Baidu Input Method.
13. bugtogo: When the system has problems, some report files are generated and stored in this folder.
14. cmp: Personally, I initially judge this as a music cache folder.
15. data: Also a folder for cached data, similar in nature to Android.
16. DCIM: Camera cache folder.
17. documents: Related folder for Documents To Go.
18. etouch: Cache folder for the eTouch app.
19. extracted: Default extraction directory for decompression software like AndroZip.
20. gameloft: As the name suggests, folder for Gameloft game data packages.
21. handcent: As the name suggests, Handcent (super SMS) data folder.
22. handyCurrency: Folder related to currency exchange rates, appears after installing HandyCalc (scientific calculator).
23. ireader: As the name suggests, the cache folder of iReader.
24. KingReader: As the name suggests, the cache folder of KingReader (reading app).
25. LazyList: Cache directory for AppPlanet (Black Market), maybe related to other apps as well, not clear for now.
26. LOST.DIR: Files that are lost or corrupted on the card will end up here. This directory is unnecessary and will automatically regenerate if deleted.27. moji: As the name suggests, the cache directory for Moji Weather. 28. MusicFolders: The cache folder generated by Poweramp. 29. openfeint: As the name suggests, the cache folder for OpenFeint. 30. Picstore: A directory created by photo browsing software. 31. Playlists: The cache folder for playlists. 32. renren: As the name suggests, the cache folder for the Renren client. 33. screenshot: Seems to be the directory where screenshots are saved, but I don't remember installing the Screenshot app. 34. ShootMe: As the name suggests, the directory where images are saved after screenshots taken by ShootMe. 35. SmartpixGames: The cache folder for games produced by Smartpix Games, such as Jewellust. 36. sogou: As the name suggests, the cache folder for Sogou Pinyin. 37. SpeedSoftware: The cache folder for the RE File Manager. 38. SystemAppBackup: After SystemApp remove (deep uninstall) backs up system files, the backup files are saved in this directory. 39. TalkingFriends: The directory where recorded videos from Talking Tom (the talking cat) are saved. 40. Tencent: As the name suggests, the cache directory for Tencent software, such as QQ. (Not the same as the .QQ folder mentioned above) 41. TitaniumBackup: As the name suggests, the directory where apps backed up by Titanium Backup are saved. 42. TunnyBrowser: Seems to be the cache directory for Dolphin Browser, but not sure why it's called this name, Tuna Browser… 43. UCDLFiles: The directory where UC Thunder downloaded files are saved. 44. UCDownloads: The directory where UC Browser downloaded files are saved. 45. VIE: The cache directory for Vignette (Vignette Camera). 46. VPN: As the name suggests, the VPN data cache directory. 47. yd_historys: The cache directory for search history in Youdao Dictionary. 48. yd_speech: The cache directory for word pronunciations in Youdao Dictionary. 49. youmicache: Will automatically regenerate after deletion; the cache directory for Youmi ads, with the ad program embedded in other apps.
