You didn't reveal the OS but if it's XP you hit the 127GB limit and we are unsure if the BIOS supports drives with the 42 BIT LBA.
So you'll want an 120GB IDE Laptop Drive. Frankly I would not touch this machine but try some 32GB memory stick to give me some space. Examples follow.
Again, I strongly suggest this machine be left as-is, as-found.
Hi, I need some advice. I have an extremely old laptop purchased in 2005. I use it mainly for school, Word documents, and surfing the web. In 2010, I upgraded to Microsoft Office 2010, which caused it to move much slower. It is an HP CTO Pavilion zv6000 Series Notebook. Windows XP Professional with SP 2. AMD Anthon 64 3500+ (2.2 GHz/512 KB L2 Cache). 128 MB ATI Radeon xpress 200M. 1.0 GB DDR SDRAM (2x512 MB). 80 GB 5400 RPM Hard Drive.( I gave a lot of info, not sure what you actually need,) I am so very aware how antiquated it is, but I'm unemployed and am a student and it works okay. Was looking to get around 500GB, but not sure if I can still find something compatible for my system. Prices, including data transfer kit weren't bad. Please advise. Thanks, in advance.