iMac late 2012 1TB Samsung storage

This iMac is running well due to a storage boost some years ago when Samsung 1TB SSD was put in by a technician. This computer has been well looked after, used by a writer using Word, photos, emails etc. The only reason I'm parting with it is that it can't do upgrades any more, which affects Safari, Word and other functions, and so it is no longer useful to me. The main value, I'm told, is the Samsung 1TB SSD 21.5-inch, Late 2012 Upgraded to OS Catalina, Version 10.15.7 Processor 2.7 GHz Quad-Core Intel Core i5 Memory 8 GB 1600 MHz DDR3 Startup Disk Samsung 1TB SSD Graphics NVIDIA GeForce GT 640M 512 MG Serial Number CO2JNH09DNCR