I have an early 2008 MBPro. It's a real work horse. I currently have my memory storage split for Snow Leopard and El Capitan OSX. The latter partition works well for at 129 GB. The SL Partition was used for my work, but I do not need it now, but I will back it up on my Time Machine. The El Capitan partition has about 10 GB free, and I will be deleting data for an additional 10 GB free memory. 1. Will I regret not getting 256 GB memory storage, or should I just get the 128 GB memory storage, and used SD Disk and/or USB memory stick for extra storage? Also, any recommendations for which to use for additional storage between the SD Disk or USB Stick? Thanks in advance for your help.