When using ChromeOS or the HTML5 CWA and browsing the local computer's drive using the client drive mapping feature, there seems be either an undocumented limitation or bug when showing and accessing files over 4GB. Has anyone else experienced this issue? When trying to access a 4+GB file it shows as only ~2.5GB and only transfers (when copying from client to host) that much thus truncating the file and potentially corrupting it. I'm running VDA 2507 LTSR and 2507 ChromeOS CWA, but it has been an issue with older versions of both.

@Vishal Sinha can you look in to this?

It sounds like a 32-bit vs 64-bit limitation and the file sizes over 4GB are doing an overflow/rollover error. The file in question is a Windows 11 ISO which is 6.5GB in size and shows as 2.5GB through the drive passthrough (6.5-4=2.5). If that makes any sense. This was apparently an issue prior to 1808 which was supposedly fixed: https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX134844

Check settings in configuration.js „maxuploadsize” - by default it’s 2GB

This environment uses Citrix Cloud, so we don't have control over the HTML5 configuration files. In Citrix GACS, you can set a max upload/download size, but the default limitation doesn't allow setting higher than 2GB. Is this setting for the upload/download buttons in the toolbar or does this limitation also affect the "map a drive" feature as well?

Check this: https://docs.citrix.com/en-us/citrix-workspace-app-for-html5/file-handling.html

Thanks, I have read through the Citrix documentation for both HTML5 and ChromeOS CWA and while there are limitations listed for the file transfer feature, there are no file size limitations listed for the client drive mapping feature. This feature seems to rely on some built-in Chromium File Access API (as this feature is only limited to work on those browsers). So this seems to point to either a limitation of those APIs (of which I am unable to discern from any official Chromium documentation) or a bug/undocumented limitation on the Citrix side of things. I was just seeing if anyone here had experienced the same issue and if the Citrix employees that browse this channel had any info to share.

Hi Keith, as you have pointed out, there is no limitation on the file szie for the client drive mapping. Have you logged a support ticket with details to get this analyzed further?

@Vishal Sinha It's taken a long time (finally have some downtime to troubleshoot this with Citrix), but we just put in a support case for this; Case Number: 101749001