Backups are managed via the Finder, not iTunes.
There is no setting in iTunes to simply change the backup location. However, advanced users use to trick the operating system into storing backups on a different drive. itune backup location
iTunes backups are stored in specific system directories that vary depending on your operating system. Because these folders are often hidden by default, you usually cannot find them by simply searching your hard drive through the standard search bar. 💻 Windows Backup Locations On Windows, the location depends on whether you installed iTunes from the Backups are managed via the Finder, not iTunes
These are "Unique Device Identifiers" (UDIDs). iTunes backups are stored in specific system directories
When you open the Backup folder, you will not see clearly named folders like "John's iPhone." Instead, you will see folders with long, random strings of letters and numbers (e.g., 00a1b2c3d4e5f6... ).