We’re over a hump day, and I would like to share an insight that may come handy to those of you that upload binaries to their clusters manually. 

Did you know that you have seven days to use the upgrade package that you uploaded to the cluster manually before it is removed from the file system? 

That’s right. Even if you have triggered pre-upgrade checks for the version, but the package is not used it deleted automatically. Make sure to clean up uncompressed software location and check the /home space on a CVM before you re-attempt the upload.

KB-10300 Uploaded AOS upgrade binary is unavailable on Prism has more information

To wrap your head around upgrades
All things considered — upgrade sequence and preaparation guidelines
Foundation of a successful upgrade - up to date Foundation
Nutanix upgrades FAQ: AOS, LCM, NCC, Hypervisors, Files