You have done the right thing, 'first do no harm' don't delete, send virus to the chest and investigate.
There is no rush to delete anything from the chest, they can't do any harm there. Anything that you send to the chest you should leave there for a week or two. If after that time you have suffered no adverse effects from moving these to the chest, scan them again (inside the chest) and if they are still detected as viruses, delete them.
Deletion is never a good first option as it leaves no other options, from the chest you can investigate (google the file name, forums, etc.), ensure the detection is correct and if necessary restore the file to its original location.
