In XenApp and XenDesktop, very large files that have a file size greater than 4GB are not supported with Client Drive Mapping.

For Example, when viewing a file which is greater than 4GB using a published Windows Explorer instance in a XenApp Client Mapped Drive, file size will be incorrectly displayed.

The following error message might appear:
"The file <filename> is too large for the destination file system"

When copying a file with file size greater than 4GB using a CDM mapped drive, the file is partially copied, resulting in an incomplete target file being written.

This behavior is because of a 32-bit file system being used by ICA which is limited to indexing files of less than 4GB when using the Client Drive Mapping feature in XenApp or XenDesktop.

Virtual Delivery Agents from version 1808 and above now supports transfers of files larger than 4 Gbytes. Citrix Workspace app for Windows minimum version 1808 is required.


CTX113480 – Error: Cannot copy (file name):Invalid MS-DOS Function... when using Client Drive Mapping and Files Larger than 2 GB