Single File System: Virtual File System Delphi Library
for Archive / Backup with Transparent Compression and Strong Encryption

TSingleFileSystem.DiskFree
TSingleFileSystem
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Returns the number of free bytes in a single file system.

function DiskFree: Int64;

Description
DiskFree returns the number of pre-allocated but unused bytes within a single file.
The single file size can be decreased on this value by repairing operation.

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