You might want to also check out version 2.5.0 of the Library of Congress' Bagger. It has been improved and has metadata ready to help with your accession (such as media type, media number, records series, title, etc.). What is important is that it uses the BagIt standard, which could be a plus, depending on what tools you wuld use to manage the accessionned bags.
For more detail, see the recent Library of Congress blog on the topic http://blogs.loc.gov/digitalpreservation/2016/04/baggers-enhancements-for-digital-accessions/?loclr=eadpb
In the spirit of full disclosure, I co-authored th blog above, and you are free to also check out Exactly.
In summary, Bagger and Exactly adhere to the BagIt standard. Data Accessioner (as POWRR mentionned earlier) uses many preservation metadata tools imbedded to capture the digital objects' properties. Check them all out and make your choice.
Hope this helps,