update error - not enough disk space

/system package update download
channel: current
installed-version: 6.43.2
latest-version: 6.43.8
status: ERROR: not enough disk space, 7.2MiB is required and
only 7.1MiB is free

ОК. I deleted the backup file (150 kb) and when I run “/system package update download” I see firmware package in /file

/file print

NAME TYPE SIZE CREATION-TIME

0 skins directory jan/01/1970 02:00:05
1 routeros-smips-6.43… package 7.3MiB jan/10/2019 11:34:51

After that, I rebooted and still see the old version 6.43.2
Why is the firmware file so big?
Why not enough space for an update?
How do I free up disk space?

Use Netinstall to reformat and install ROS.

https://wiki.mikrotik.com/wiki/Manual:Netinstall

see also this thread: http://forum.mikrotik.com/t/hap-lite-not-enough-space-for-update/126655/1