Need help for Android

After I bought an Android phone from a second-hand store, as i know it was 64 GB, but I checked the actual memory for 20 GB. and there are not many photos,messages and apps on this Android phone.Maybe they were saved in a device file on the phone, and I couldn't find them.How do I deal with them?

the android operating system should show you waht is whaere and how much of it is used, iirc under settings => storage.
if it doesn't show 64GB, i find it likely that you were cheated.

Originally Posted by ondoho the android operating system should show you waht is whaere and how much of it is used, iirc under settings => storage. if it doesn't show 64GB, i find it likely that you were cheated.

I wish I'd been cheated, if so that i can return it , but it shows 64 GB ,the available memory is only 20 GB,That means that 44 GB has been taken up.

The OS is stored on that 64GB, if it's like a tablet, therefore it is 64 minus the size of OS, for your actual storage space.

Somewhere in the Android settings (it tends to vary a bit from version to version) there is a place to check your storage usage. On my phone (T-Mobile HTC U11 with Android v. 8.0.0), it's Settings-->Phone-->Storage.

Originally Posted by frankbell Somewhere in the Android settings (it tends to vary a bit from version to version) there is a place to check your storage usage. On my phone (T-Mobile HTC U11 with Android v. 8.0.0), it's Settings-->Phone-->Storage.

Sure ,maybe i need to clean up my phone space ,I suspect there's still some data or apps on the phone that hasn't been cleaned up.
That's the only way to do that

It is ALWAYS a good idea to factory reset a second hand phone. I always boot into recovery first thing and totally wipe it.

Originally Posted by Mill J It is ALWAYS a good idea to factory reset a second hand phone. I always boot into recovery first thing and totally wipe it.

Totally agree, that's the first thing I'd do. In many countries it's illegal for a store to sell a phone that hasn't been factory reset.

Lacemrt: If you didn't factory reset the phone yourself and have used it with any of your own accounts I would strongly suggest resetting the password on all those accounts and NOT from the phone. You have no idea whether or not any spyware was running.

Originally Posted by Mill J It is ALWAYS a good idea to factory reset a second hand phone. I always boot into recovery first thing and totally wipe it.

Can you make sure that Factory reset can completely delete them from my phone , But it seems unlikely.

a factory reset will delete EVERYTHING from the phone that wasn't on it when it came from the factory. hence the name.

Originally Posted by ondoho a factory reset will delete EVERYTHING from the phone that wasn't on it when it came from the factory. hence the name.

I don't know if you have tried ,but i have tried once , the data can be deleted form my phone after the factory reset , but they don't seen to have been completely delete since i can recover them back ,

totally agreed