It has been a long time since its release Linux Mint 20. Eventually the distribution development team published instructions for the update. The remarkable thing is that this time you can only upgrade the Mint 19,3 64-bit.
Users running the 32-bit distribution are not so lucky.
The reason for this change is obvious, since Linux Mint 20 is based on Ubuntu 20.04 LTS, and both operating systems only exist in 64-bit versions. The Linux Mint 19.3 is the last version that supports the architecture 32-bit and its use will be possible until April 2023.
If you are satisfied with the current installation of Linux Mint 19.3 and do not need to upgrade to version 20, as you can safely use your current operating system for one or two years.
Otherwise, you should take a look at the detailed guide below
How to upgrade to Linux Mint 20
The steps include a series of recommendations, e.g. to create a system snapshot με την εφαρμογή TimeShift. Απαιτεί επίσης την εγκατάσταση ενός νέου packetuh, mintupgrade.
The other steps are standard and will be familiar to friends of the distribution.