Anyone can offer an expensive tablet, but only few manufacturers offer affordable tablets with good equipment and performance. The stage belongs to the Samsung Galaxy Tab A7 LTE, since it is distinguished by exactly those virtues, and at 290 Euros (~$345; ~$290 in the US), it is one of the best tablets in its price class.
https://www.notebookcheck.net/Samsung-Galaxy-Tab-A7-LTE-Tablet-Review-One-of-the-best-tablets-for-less-than-300-Euros-356.506064.0.html
Adoptable storage is not supported by Samsung, so actually you CANNOT expand the storage with an SD card.
Thats not true you can attach sd card in it up to 1 tira