When I try to Flash the new Firmware to my Antminer T15s it says the "file is too large"...
This is sometimes a problem of some miner from Bitmain when flashing it with the latest firmware and sometimes the issue is miner's program it might be corrupted.
Mostly they can solve this issue by flashing it through SD card but since Bitmain is not yet releasing the sd card recovery for this unit model the final option is to contact them via their support or send a ticket about your issue form here
https://support.bitmain.com/hc/en-us/requests/newAnother option that I think you should try first before contacting Bitmain support is to restore or hard reset the miner before you upgrade the miner to the latest version.
If you don't know how to reset this follow this method below.
1. Turn on the server and let it run for 5 minutes.
2. On the controller front panel, press and hold the Reset button for 10 seconds.
Resetting your server will reboot it and restore its default settings.
- The red LED will automatically
flash once every 15 seconds if the reset is operated successfully.
And I also suggest you to try the 3 methods to hard reset the miner from here
How to reset miner to factory settingsDon't forget to do the "Restore via "IP Report" button" because it may revert the firmware to the factory firmware(It means if your miner upgraded before you can revert it back to the original firmware through this button).
If you are done with this try to flash/upgrade it again with the latest firmware.