u/Interesting_Pen_1730

Hi, so I would like to repurpose my jailbroken iPad mini 2nd gen (32 bit) on iOS 9.3.5 as an ereader because it has many more features than my kindle. I'm trying to transfer 500 .epub and .mobi files to it and add it to iBooks. I haven't found a decent way to transfer files as iCloud doesn't work for transferring or takes too long and most cloud services don't let me log in. If anyone helps me I will be very grateful. Thanks