Note: Downloading offline areas isn't available in some regionsīecause of contractual limitations, language support, address formats,Īlthough there's no official word from Google on it, I'd say it's highly likely that this time limit is related to contractual limitations at least in some areas. On the same link above, I would say this gives a clue:

There's a bit of conjecture online about what the reason for this may be, and whether it's potentially related to Google being worried that maps will be out of date. (from Google Maps Help - Download areas and navigate offline) To update your area when you're connected to the Internet and plugged If your offline area expires in 15 days or less, Google Maps will try You can also use turn-by-turn directions, search, and GPS on offline maps.Offline areas that you downloaded on your phone or tablet need to be.Offline maps last for a year, after which they have to be updated, meaning if you download a map on May 24, 2022, it'll remain usable till May 24, 2023.Basically, the more data there is in the selected area, the bigger the file will be. Downloading an offline map can take anywhere from 10MB to 2GB or more, depending on how big an area you include in the map and how dense that selected area is.If you're a frequent traveler, a quick workaround to this limitation is to simply save multiple offline maps of consecutive regions.There's no official limit to how many offline maps you can save, but there's a limit to how far you can zoom out when selecting the size of the map.They also don't show available cabs, alternate routes, or different map types. Offline maps don't show live traffic data or directions for public transit, bicycling, or walking.You can use them for navigation, yes, but there are a few things you should keep in mind before using offline maps:

As great as offline maps are, they don't give you the full Google Maps experience for obvious reasons.

Google maps offline