Frank wants to get a laptop for his brother, who lives in Ukraine. Leo says that 8GB RAM is the minimum for a Windows 10 PC, but Leo says he should double that. RAM is different from hard drive storage. Get as much as he can afford, but 128GB is the minimum for a hard drive, 256GB is even better.
An SSD is best. Frank has a budget of $300. Leo says that's going to limit Frank's choices, so if he can go higher, the better.
Another option is a Chromebook. Less expensive, so he can get more bang for the buck, and if his brother's work is mostly online, that would be ideal.
Also, check Crossborder.fedex.com for prohibited items going to Ukraine. He won't want to send a prohibited item (electronics is such) and lose the laptop.