As an administrator, you can restrict file types from being synchronized to the server using policy settings. Specifically, the Excluded Extensions policy lists default excluded extensions that can optionally be modified to accommodate the needs of an organization. Using this policy, you can help protect organizations and user accounts from files that might contain malicious code. Other file types, such as temporary and system files and folders, are permanently blocked from the system (hard-coded).

This article will provide information on hard-coded excluded directories and extensions, as well as default excluded extensions that are configurable through policies.

Hard-Coded Excluded Extensions

Temporary Files

Temporary files, which are usually created by applications when saving or editing a file, are hard-coded as excluded extensions. These files include:

Extension Description
Any file name beginning or ending with ~ For example, Microsoft Word or PowerPower files
Any file name beginning with ~$
.lock Libre/open office lock files
.tmp   All .tmp files, including Microsoft Excel and PowerPoint files
.dwl AutoCAD files
.dwl2 AutoCAD files
sav*.tmp AutoCAD files
.atmp AutoCAD files
.laccdb Microsoft Access lock file
.swp Microsoft Access lock file


Temporary Folders

Temporary folders are also hard-coded as excluded from the sync process. These folders include:

Folder Description
*temp temp folder and anything below it
*tmp tmp folder and anything below it
DfsrPrivate A hidden folder used to stage files for replication actions.


System Files and Folders

System files and folders are also hard-coded as excluded from the sync process.  These system files and folders include:

System File or Folder Description
desktop.ini A file in the Windows operating system used to define how a folder should be displayed
Thumbs.db A file that stores thumbnail cache
.DS_Store A file in the OS X operating system used for storing custom attributes of a folder
.ICON A file in the OS X operating system used for adding a custom folder icon.
*WINDIR Path to the windows directory
*System Volume Information Path to the System Volume Information folder
*MSOCache* Path to the MSOCache folder
*I386 Path to the I386 folder
*\Documents and Settings\All Users\AppData\* Path to the AppData folder
*\Documents and Settings\*\NTUSER.DAT Path to the NTUSER.DAT folder
*\Documents and Settings\All Users\Application Data\* Path to the Application Data folder
*\Documents and Settings\*\Cookies\* Path to the Cookie’s folder
*\Documents and Settings\*\Local Settings\* Path to the Local Settings folder
*\Documents and Settings\*\NetHood\* Path to the NetHood folder
*\Documents and Settings\*\PrintHood\* Path to the PrintHood folder
*\Documents and Settings\*\History\* Path to the History folder
*\Program Files\Carbonite\Carbonite Backup\* Path to the Carbonite Backup folder
*\Program Files\Microsoft Office\Clipart\* Path to the Microsoft Clipart folder
*Recycle.Bin The Recycle Bin
*\ProgramData\* Path to the ProgramData folder


Folders Excluded from Being Backed Up

AXIS CloudSync allows end users to back up folders that exist on their local machine. Certain folders, however, are excluded from being backed up (these mostly apply to Mac OS X).

Folder Description
/Users/*/.Trash/* Path to the Trash folder
/Users/*/Library/Caches/* Path to the Cache folder
/Users/*/Library/Cookies/* Path to the Cookies folder
/Users/*/Library/Logs/* Path to the Logs folder
/Users/*/Library/PubSub/Feeds/* Path to the Feeds folder
/Users/*/Library/Application Support/SyncServices/Local/* Path to the Sync Services local folder
/Users/*/Burn Folder*/* Path to the Burn Folder
/Users/*/Parallels/* Path to the Parallels folder
/Users/*/Virtual Machines*/* Path to the Virtual Machines folder


Default Excluded Extensions Configurable Through Policy Settings

Administrators can also define additional excluded extensions using policies. The Excluded Extensions policy setting maintains the following list of default excluded extensions; however, these can be modified according to the needs and preferences of the individual organization.

Note: Information displayed in the following table was collected from FileInfo.com. For more information, please reference FileInfo.com.

Configurable Excluded Extensions File Type
.$$ Temporary File
.$db dBASE Temporary File
.113 Iomega Backup File
.3g2 3GPP2 Multimedia File
.3gp 3GPP Multimedia File
.3gp2 . 3GPP Multimedia File
.3gpp 3GPP Media File
.3mm 3D Movie Maker Movie Project
.a Static Library
.abf Analysis Services Backup File
.abk Automatic Backup File
.afm Adobe Font Metrics File
.ani Windows Animated Cursor
.ann Lingvo Dictionary Annotation File
.asf Advanced Systems Format File
.avi Audio Video Interleave File
.avs AVS Preset File
.bac Backup File
.bak Firefox Bookmarks Backup
.bck VMX Backup File
.bcm Business Contact Manager File
.bd2 Lacerte Tax File
.bdb Microsoft Works Database Backup File
.bdf Binary Data File
.bkf Windows Backup Utility File
.bkp Backup File
.bmk BillMinder Backup File
.bsc Visual Studio Source Browser Information File
.bsf Blu-ray AVC Video File
.cab Windows Cabinet File
.cf1 Common File Format 1 File
.chm Compiled HTML Help File
.chq Microsoft Help Combined Full-Text Search File
.chw Compiled Help Index File
.cnt Help Contents File
.com DOS Command File
.cpl Windows Control Panel Item
.cur Windows Cursor
.dbs SQLBase Database File
.dev Dev-C++ Project File
.dfont Mac OS X Data Fork Font
.dll Dynamic Link Library
.dmp Windows Memory Dump
.drv Device Driver
.dv Digital Video File
.dvd DOS Device Driver
.dvr Microsoft Recorded TV Show
.dvr-ms Microsoft Digital Video Recording
.eot Embedded OpenType Font
.evt Windows Event Viewer Log File
.exe Windows Executable File
.ffa Find Fast Status File
.ffl Find Fast Document List
.ffo Find Fast Document Properties Cache
.ffx After Effects Preset File
.flc FLIC Animation
.flv Flash Video File
.fnt Windows Font File
.fon Generic Font File
.ftg Full Text Group
.fts Full Text Search
.fxp FoxPro Compiled Program
.gid Windows Help Global Index File
.grp             StarCraft Graphics Group File
.hdd            Parallels Desktop Hard Disk File
.hlp Windows Help File
.hxi Compiled Help File
.hxq Microsoft Help Merged Query Index File
.hxr Microsoft Help Data File
.hxs Help 2 Compiled Help File
.ico Icon File
.idb IDA Database File
.idx Movie Subtitle File
.ilk                                  Incremental Linking File
.img Disc Image Data File
.inf Setup Information File
.ini Windows Initialization File
.ins Adlib Tracker Instrument File
.ipf SMS Installer Script
.iso Disc Image File
.isp IIS Internet Service Provider Settings
.its Impulse Tracker Sample
.jar Java Archive File
.jse JScript Encoded File
.kbd 3ds Max Keyboard Shortcuts File
.kext Mac OS X Kernel Extension
.key Software License Key File
.lex Adobe Linguistic Library Data File
.lib Generic Data Library
.library-ms Windows Library Description File
.lnk Windows File Shortcut
.log Log File
.lwfn Adobe Type 1 Mac Font File
.m1p MPEG-1 File
.m1v MPEG-1 Video File
.m2p MPEG-2 Program Stream File
.m2v MPEG-2 Video
.m4v iTunes Video File
.mem FoxPro Variable File
.mkv Matroska Video File
.mov Apple QuickTime Movie
.mp2 Heroes of Might and Magic II Map File
.mp2v MPEG-2 Video File
.mp4 MPEG-4 Video File
.mpe MPEG Movie File
.mpeg MPEG Movie
.mpg MPEG Video File
.mpv MPEG Elementary Stream Video File
.mpv2 MPEG-2 Video Stream
.msc Microsoft Management Console Snap-in Control File
.msi Windows Installer Package
.msm Windows Installer Merge Module
.msp Windows Installer Patch
.mst Windows Installer Setup Transform File
.ncb Visual C++ IntelliSense Database
.nt Windows NT Startup File
.nvram VMware NVRAM File
.o Compiled Object File
.obj Wavefront 3D Object File
.obs ObjectScript Script File
.ocx ActiveX Control
.old Backup File
.ost Outlook Offline Folder File
.otf OpenType Font
.pch Precompiled Header File
.pd6 Windows Photo Gallery Data File
.pf Private File
.pfa Printer Font ASCII File
.pfb Printer Font Binary File
.pfm Printer Font Metrics File
.pnf Precompiled INF File
.pol Windows Policy File
.pref Preferences File
.prf PICS Rules File
.prg Program File
.prn Printable File
.pst Outlook Personal Information Store File
.pvs Parallels Desktop Configuration File
.pwl Windows Password List
.QBA QuickBooks Accountant’s Copy Work File
.QBA.TLG QuickBooks Transaction Log File
.QBW QuickBooks Data File
.QBW.TLG QuickBooks File
.qt Apple QuickTime Movie
.rdb Wavelet Video Images File
.reg Registry File
.rll Microsoft Resource Library
.rox Roxio Project File
.sbr Visual Studio Source Browser Intermediate File
.scf DNA Sequence Chromatogram File
.scr Windows Screensaver
.sdb Custom Application Compatibility Database
.shb Windows Document Shortcut
.suit Macintosh Font Suitcase
.swf Macintosh Font Suitcase
.swp Vi Swap File
.sys Motorola Driver File
.theme Microsoft Plus! Desktop Theme
.tivo TiVo Video File
.tmp Temporary File
.tms Telemate Script
.ttc TrueType Font Collection
.ttf TrueType Font
.v2i Norton Ghost Virtual Volume Image
.vbe VBScript Encoded Script File
.vga VGA Display Driver
.vgd Generic CADD VGA Driver
.vhd Virtual PC Virtual Hard Disk
.video aTube Catcher Video File
.vmc Windows Virtual Machine Configuration File
.vmdk Virtual Machine Disk File
.vmsd VMware Snapshot Metadata File
.vmsn VMware Snapshot State File
.vmx VMware Configuration File
.vxd Virtual Device Driver
.win FoxPro Window Settings
.wpk Nero Wave Editor File