The primary location for downloaded IPSW firmware files in is a folder titled "3uTools-Firmware" , which is typically found in the root directory of the drive where you installed the software (e.g., C:\3uTools-Firmware ). How to Find the IPSW Location

If you have downloaded an IPSW file from another source like IPSW.me , you do not need to move it into the 3uTools folder. Instead: Go to the tab. Click the Import button next to the desired iOS version.

A critical UX observation: 3uTools’ internal database prioritizes download count (popularity) over file size. Thus, the “Top” list in the software’s “Firmware Download” tab shows iPhone 12 IPSWs before the larger iPhone 15 files. —forcing a filesystem-based view over the software’s curated ranking.