Is there any way to reset an old samsung device

[DrXMNN]

I have a very old samsung device and I dont have access to account and phone number with which account was created so I'm stuck with a little over 1 gb space and rest 14-15 gb is just junk which I can't delete.

[DanRegal]

try sd maid

[Kunal2]

https://youtu.be/ld-7UXii8Us

[AkshayParadkar · Accepted solution]

If that device is running on android lollipop 5.0 or above then only one way to unlock it is flashing the software through service center.

Otherwise you can reset it using recovery mode

[yash1th]

Do a hard reset of the device. What is the device model?

[DrXMNN]

Galaxy J7 Nxt