Components All New MacOS Windows Linux iOS
Examples Mac & Win Server Client Guides Statistic FMM Blog Deprecated Old


Queries information about a volume.

Component Version macOS Windows Linux Server iOS SDK
Files 5.0 ✅ Yes ✅ Yes ✅ Yes ✅ Yes ✅ Yes
MBS( "Files.DiskInfo"; Mode; PathToVolume )   More


Parameter Description Example
Mode What to return. Can be totalBytes or freeBytes.
On Windows you can also pass DriveType for type or FreeBytesAvailable to learn available space for current user.
On macOS you can query also fileCount, folderCount, blockSize, totalBlocks or freeBlocks.
PathToVolume The path to volume. e.g. C:\, \\MyServer\MyDisk\ or /Volumes/testDisk/ or / for root volume on macOS. /


Returns value or error.


Queries information about a volume.
Please pass native path to volume.
For Windows network volumes with \\ syntax, please include trailing backslash.

UnknownThe drive type cannot be determined.
RemovableThe drive has removable media; for example, a floppy drive, thumb drive, or flash card reader.
FixedThe drive has fixed media; for example, a hard disk drive or flash drive.
RemoteThe drive is a remote (network) drive.
CDROMThe drive is a CD-ROM drive.
RAMDiskThe drive is a RAM disk.

Implemented for iOS with 12.4, so you can query totalBytes, freeBytes and createDate.

This function requires a native path. Use Path.FileMakerPathToNativePath to convert a FileMaker path to a native path if required. If you like to have the user choose the path, you can use FileDialog functions.
For Server be aware that server has limited permissions and may not be able to access all files on a computer.


Query free bytes on macOS root volume:

MBS("Files.DiskInfo"; "FreeBytes"; "/")

Query total size of a mounted volume on Mac:

MBS("Files.DiskInfo"; "TotalBytes"; "/Volumes/Ablage1")

Query number of files and folders on Mac:

MBS("Files.DiskInfo"; "FileCount"; "/") & " files and " & MBS("Files.DiskInfo"; "FolderCount"; "/") & " folders."

Query available free bytes on C: for Windows:

MBS("Files.DiskInfo"; "FreeBytesAvailable"; "C:")

Queries size of shared folder in VMWare on Windows:

MBS("Files.DiskInfo"; "TotalBytes"; "\\\\vmware-host\\Shared Folders\\Downloads\\")
// please note the double quoting for backslashes in string constants!

Check drive type on Windows:

MBS( "Files.DiskInfo"; "DriveType"; "C:" )

Queries sizes and free space on root and boot disks on Linux:

MBS( "Files.DiskInfo"; "FreeBytes"; "/" ) & ¶ &
MBS( "Files.DiskInfo"; "TotalBytes"; "/" ) & ¶ &
MBS( "Files.DiskInfo"; "FreeBytes"; "/boot" ) & ¶ &
MBS( "Files.DiskInfo"; "TotalBytes"; "/boot" )

See also

Release notes

Blog Entries

This function checks for a license.

Created 3th February 2015, last changed 21st July 2022

Files.DirectoryExists - Files.EvictUbiquitousItem