depende sa settings yan. meron kasi setting sa ntfs drives to protect folders
also, depende rin sa OS ng kabilang PC. kung pareho sila xp, you should be able to open all folders without any problems (unless protection setting is active)
as for the filenames, yung mga ~1 is for older file systems that only has a max number of charcters. its like DOS, try to browse your folders using DOS and makikita mo yung mga folders na mahaba ang name, mapuputol din yan
most likely the cause of that is the program you are using. it may not support long folders names kaya napuputol