If you can find an old SCSI 1 hard drive, that is a good way to transfer data onto an SE, but it requires formatting the disk on the SE and using a bridge machine like an Apple g4 tower or similar that can still run os x and OS 9 and that has both modern USB and the capability to connect a SCSI 1 disk, usiing a SCSI card

with such old macs you really need a bridge machine that can communicate with modern machines but still have enough legacy to transfer to an early 90s Mac