Perhaps this is why Abedin has not spoken
Huma Abedin Swore Under Oath She Gave Up ‘All the Devices’ With State Dept. EmailsIf this is the case, "I forgot" is unlikely to be an acceptable answer. But Clinton is probably also not out of the picture since she can be tied to many of those emails. If they were not in her original production then she could also be the subject of charges.
The FBI found emails pertinent to its Clinton investigation, reportedly on a computer from her aide’s home. That doesn’t jibe with she told lawyers this summer.