<style>
.button {
  background-color: #343a40;
  border: none;
  border-radius:.25rem;
  color: white;
  padding: .5rem .75rem;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 1rem;
  font-weight:bold;
  float:right;
}
.button:hover {
  color: #ddd;
}
</style>
<a class="button" href="/upload2usb/">Upload to USB</a>