Convert Back Wordpress site due to Wordpress Theme Update

Due to WP Theme update, the WP site CSS configuration was updated. Past programmers must have updated the parent theme versus the child theme. A past configuration is available on a subdomain, but I can't find what files are different in review of the wp_content directory. TASKS: - Understand the past configuration and make the new configuration work the same by updating individual files. - Define each file path that is modified for my records if this is so. - If the update is within the parent theme file, convert the parent update to a child theme to prevent this from happening again if possible. If not possible, justification needs to be provided. -Review and provide guidance to reduce the number of rows in Table wp_postmeta. This is a very very large file and it affects UpdraftPlus Backup Plugin. May require a different plugin if this is the fault of UpdaftPlus. Justification is required to understand why wp_postmeta should stay the same. -Review and recommend if the font size for the mobile option is required. It looks large to me. - Knowledge of WHM and Cpanel - Wordpress theme - Emmet Lite / Emmet Child - Good template - [login to view URL] - Required update - [login to view URL] Good English skills are required and communication via text / emails are required Boiler Plate responses will be ignored. Write an original response. The project will be awarded in three days due to holiday.