Hi -
I was just reading your response and found it interesting since that's what I am planning to do shortly. Rather than do an upgrade of High Sierra on my existing SSD, I am using new SSD (Samsung EVO 8501TB). However, I didn't think I could just do a restore from Time Machine since my Time Machine backup will be from my existing OS (Mountain Lion).
I am still planning to do a Time Machine backup before inserting the new SSD but also planning to backup files to an external hard drive by running individual backups of the programs I will continue to use (photos, MS Office documents, etc.). My plan was to restore the files from my individual backups of the programs i will continue to use.
However, I didn't think I would want to do a complete restore from Time Machine to High Sierra since that was based on Mountain Lion. Don't I run the risk of restoring files that are no longer relevant because of the switch to High Sierra?
Thanks