Whatsapp backup size is 12GB but why does it show 53GB when I'm trying to restore on new phone

[Android Central Question]

I'm a whatsapp user and migrating to a new better phone. Before that I took complete backup of whatsapp from Old phone which was 12GB in size.
Now I installed whatsapp on new phone and when I'm trying to restore backup from GDrive(used same gmail a/c and phone number), it says the size of backup is 53GB which is way more than actual size.
Could you please advise how can I fix this issue and be able to restore only 12GB (actual size)?

 

[kyrangough2019]

Do you have multiple WhatsApp backups, or is it just the one? It might be trying to restore multiple WhatsApp backups that may not be needed.

 

[B. Diddy]

I moved this to the WhatsApp forum for more specific traffic.

 

[Rukbat]

Could it be that the backup is zipped, and the actual file size of the unzipped backup is 53GB?