cant restore backup from itunes on pc
i backed up my iphone 12 pro max to my laptop, it was a big backup i think over 120gb and my laptop is only 200gb, it took a long time but it backed up. i reset my iphone to factory settings, the next morning when i was restoring it, it seemed to be working but i had to leave and i unplugged the phone to take with me thinking ill just do it when i get back, then when i tried later it didnt work, it said something like 'there was an error while writing to or reading from the iphone' i tried so many different things, i restarted the iphone, i restarted the laptop, i tried a different lightning cable, then i came to the internet and i tried more things. in the end i had a external hard drive that was 500gb so i tried moving the backup to there in hopes that more space would solve my problems and now itunes is saying 'your iphone has never been backed up to this folder' even though i tried putting the backup folder back exactly where i found it i cant get itunes to see the backup. is there ANYBODY who can help i dont know what more to do, and it would really break my heart to lose some of this data :'(
iPhone 12 Pro Max