Hi. I have a 3.5 Yr old Samsung A71 4G with 128G / 6GB memory. I've been pleased with it, as it has actually outlasted my 3 year contract. It is just starting to freeze now, and it has suffered a cracked screen since 1 month from new. The battery is also definitely not lsdting as well! Having moved to a contract with smarty ,I am very reluctant to take out a new pay monthly contract and I want members advice on replacing it with a refurbished Samsung S20 S21, S22, bought outright. How much of an upgrade would these be please and could I expect another 3 years service? Also, none of these have an SD card slot. As someone with 18GB of music on my A71, how can I get over this please?