回复：公司帮我转H1B却要我提供EAD copy做为H1B TRANSFER 的 SUPPORTING DOCUMENT，我其实

If it's c5 EAD (based on OPT) and you were F1 at your last entry, the EAD is a must because it proves your valid F1 status after graduation.
If it is c9 EAD unrelated to this company, you can ignore it, because EAD is not a status.