Board Thread:Questions and Answers Forum/@comment-108.234.20.69-20160419031908/@comment-25916964-20160419215458

It takes about a day to download it on my connection, and I have reasonable speed (25Mb/s via fibre). When I was on ADLS2+ for my internet it took even longer (and that was just Destiny + DLC1 + DLC2). Unfortunately, you may just have to wait this one out.

Here are some estimated completion times. (based on game file sizes, and best case scenario theoretical values)
 * Xbox One + PS4 (up to 60GB)
 * ADSL2+ (24Mb/s - faster) 5 hours
 * ADSL (1Mb/s) 5 days
 * ADSL (256Kb/s - slower) 19 days
 * Xbox 360 + PS3 (up to 30 GB)
 * ADSL2+ (24Mb/s - faster) 3 hours
 * ADSL (1Mb/s) 3 days
 * ADSL (256Kb/s - slower) 12 days

Basically, if your connection is slow it just going to take a long time. (FYI, the times are best case scenario)