You can host bigWig files on github for free and visualize on UCSC. You just need to alter the URL slightly before loading as a custom track.
First create a new repository on github. (Github desktop is easy to use!) Then add the bigwig files and commit to main.
Original URL looks like this:
https://github.com/d0minicO/UCSC_bigWIgs/blob/main/GSE56802_DDX21_WT_iCLIPseq.bwChange this to
https://raw.githubusercontent.com/d0minicO/UCSC_bigWIgs/main/GSE56802_DDX21_WT_iCLIPseq.bwthen add to UCSC custom tracks like this:
track type=bigWig name="My Big Wig" color=0,200,0 description="A Graph of Data from My Lab" visibility=2 bigDataUrl=https://raw.githubusercontent.com/d0minicO/UCSC_bigWIgs/main/GSE56802_DDX21_WT_iCLIPseq.bw