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Last Updated December 10, 2003

File Management
  Offline Folders

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File and Folder Compression in Windows 2000

Compressing files and folders in Windows 2000 is a easy process - simply click on the file or folder, choose Properties from the menu, click the Advance Tab and check the box marked "Compress contents to save disk space". Compression may slow performance a bit, and there are a few pitfalls when using compression with offline folders, and encrypted data. You must also be aware of what happens to your compressed files when you move them between folders and hard drives.
Where to Start...

Best Practices for NTFS Compression in Windows 2000 and Windows NT 4.0
Microsoft Knowledge Base Article: 251186 - This article describes file and folder compression performance in Windows 2000 and Windows NT 4.0.

HOW TO: Compress and Expand Files and Folders in Windows 2000 with the COMPRESS, COMPACT, and EXPAND Commands (Q314958) 
Microsoft Knowledge Base Article This step-by-step article describes how to use the compact and the compress commands to compress files and folders in Microsoft Windows 2000.

All you need to know about compression and encryption for Exam 70-210
A quick primer on subjects covered for the Windows 2000 Professional MCSE exam. Includes rules for moving and copying compressed and encrypted file and folders. Source:

Additional Articles worth reading....

Cannot Select Compress and Encrypt Check Boxes in Windows 2000
Microsoft Knowledge Base Article: 225089 - When you attempt to compress or encrypt folders in Windows 2000, the Compress and Encrypt check boxes within the property sheet of the folder are selected and unavailable. Also, you may not be able to create files in the folder. (updated 1/25/2000)

Contents of the Offline Files Folder Do Not Maintain Compression on NTFS Partitions
Microsoft Knowledge Base Article: 227332 - Manually compressing the Offline Files cache\database (the %SystemRoot%\CSC folder) works, and files currently stored in the cache are compressed, but newly cached files are not stored in compressed format and previously compressed files become uncompressed after synchronization

Encrypted Files Cannot Be Compressed
Microsoft Knowledge Base Article  Q223093 - When you view the properties of an encrypted file or folder, you may notice that the files are not compressed even though the volume is set to be compressed. If you choose to compress a file using Windows Explorer interface, you may not b

"No Valid System Partitions Exist" During Setup on Compressed Drive
Microsoft Knowledge Base Article: 222972 - When you are installing or upgrading to Windows 2000, you may receive the following error message even if the boot partition is not compressed:

Unable to Copy a Compressed File to a Different Drive
Microsoft Knowledge Base Article: 228002 - When you try to copy a compressed file to a different drive, the copy operation may not work.

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