Regarding the comments about 120GB being too small, we've had 120GB SSDs in our office for the OS drive for the past three years. They have had about 50GB free during this entire time. It depends on how much software you're using. Our systems also have a 500GB drive for storage and all of our company files are stored on the server.
That said, at this point there's probably a minimal price difference between 120GB & 256GB now so 256GB is probably still the option you'd want. But if you're stuck with 120GB for whatever reason, it is doable.
We're running Windows 7 Pro, AutoCAD 2016 (also have 2015 installed), Adobe Acrobat Pro, Adobe Photoshop CS5, Adobe InDesign CS5, MS Word 2010, MS Excel 2010, and MS Outlook 2010. Then the usual stuff like web browsers, printer drivers, and small utilities. All softwares are updated.
Work: AutoCAD 2022.1.3, Windows 10 Pro v22H2 64-bit, Intel Core i7-8700K, 32GB RAM, Samsung 960 Pro SSD, AMD Radeon Pro WX 5100, 3 Dell Monitors (3840x2160)
Home: AutoCAD 2022.1.3, Windows 10 Pro v22H2 64-bit, Intel Core i7-11700, 64GB RAM, Samsung 980 Pro SSD, NVIDIA Quadro P2200, Dell Monitor (3840x2160)