There are additional folders, that do not exist but should exist, like your father's user profile directory. Your screenshot indicates there isn't a Program Files directory, which should exist, even on Windows XP. Based on the information you have it's likely not going to be possible to explicitly confirm if they were not using Windows XP Professional 圆4 Edition. If you really wanted to spend the time, you could mount the proper registry hive if it still exists on the HDD, and determine what the system properties indicate.
So my question is: How can I tell if a Windows XP partition is 64bit or 32bit if I only have the filesystem of the hard drive mounted as an external USB drive? Like, is there a specific file to readout? final version for Windows 2000, and for XP lacking Service Pack 3 (32-bit systems) or. In other words, Windows XP Professional 圆4 Edition, cannot be activated by a 32-bit Windows XP license. Windows 8.1 and Windows 10 require the latest version of Audacity. Windows XP Professional 圆4 Edition was licensed and sold separately. If your father had Windows XP then it's nearly a guaranteed fact they were using the 32-bit version. Microsoft sold Windows XP Professional 圆4 Edition has a separate license.
The data was saved and is accessible on his new Windows 10 PC. I have the old SSD with his original Windows XP partition from some years ago. I'm currently doing my father a favor and setting up an Oracle VirtualBox VM with Windows XP on a Windows 10 host PC.