I have a Dell desktop running Windows 7 . I have about 50 000 photographs on there in Lightroom 5/DNG/backups in CR2. . I also have several thousand Tiffs from scans of older film work, and many jpegs/tiffs created from the Lightroom stuff. I use Photoshop CS6 and to a lesser extent old NIK software to edit all these images. It all works well enough but its old- maybe dangerously old. The photos are backed up onto external drives & at least one copy of everything is held off-site. The digital photographs have been made on Canon 10D/5D/5Dii/5Diii. I'm well overdue a change of computer/operating system. I may well go with another Dell desktop and Windows 10/11 and recycle my screen which was replaced a couple of years back. I'm aware that my old but working software is far from up-to-date & that it will have to be replaced - presumably by subscription versions- as it won't work with the newest incarnations of Windows. I have a feeling that I'm heading for a massive task and lots of decisions. So--- What are the big tasks I face and in what order should I carry them out please? Naturally my desired end position is that I have all my photographs on a new machine, hopefully with a drive structure that mirrors the three internal drives and three external backups I have now and where all photographs and back-ups are accessible in and able to be edited in new versions of PS/LR/NIK. Am I right to feel daunted?